Appellant, Heath Benjamin, found over $18,000 in currency inside the wing of an airplane. At the time of this discovery, ap-pellee, State Central Bank, owned the plane and it was being serviced by appellee, Lind-ner Aviation, Inc. All three parties claimed the money as against the true owner. After a bench trial, the district court held that the currency was mislaid property and belonged to the owner of the plane. The court awarded a finder’s fee to Benjamin. Benjamin appealed and Lindner Aviation and State Central Bank cross-appealed. We reverse on the bank’s cross-appeal and otherwise affirm the judgment of the district court.
I. Background Facts and Proceedings.
In April of 1992, State Central Bank became the owner of an airplane when the bank repossessed it from its prior owner who had defaulted on a loan. In August of that year, the bank took the plane to Lindner Aviation for a routine annual inspection. Benjamin worked for Lindner Aviation and did the inspection.
As part of the inspection, Benjamin removed panels from the underside of the wings. Although these panels were to be removed annually as part of the routine inspection, a couple of the screws holding the panel on the left wing were so rusty that Benjamin had to use a drill to remove them. Benjamin testified that the panel probably had not been removed for several years.
Inside the left wing Benjamin discovered two packets approximately four inches high and wrapped in aluminum foil. He removed the packets from the wing and took off the foil wrapping. Inside the foil was paper currency, tied in string and wrapped in handkerchiefs. The currency was predominately twenty-dollar bills with mint dates before the 1960s, primarily in the 1950s. The money smelled musty.
Benjamin took one packet to his jeep and then reported what he had found to his supervisor, offering to divide the money with him. However, the supervisor reported the discovery to the owner of Lindner Aviation, William Engle. Engle insisted that they contact the authorities and he called the Department of Criminal Investigation. The money was eventually turned over to the Keokuk police department.
Two days later, Benjamin filed an affidavit ■with the county auditor claiming that he was the finder of the currency under the provisions of Iowa Code chapter 644 (1991).1 Lindner Aviation and the bank also filed claims to the money. The notices required by chapter 644 were published and posted. See Iowa Code § 644.8 (1991). No one came forward within twelve months claiming to be the true owner of the money. See id. § 644.11 (if true owner does not claim property within twelve months, the right to the property vests in the finder).
*404Benjamin filed this declaratory judgment action against Lindner Aviation and the bank to establish his right to the property. The parties tried the case to the court. The district court held that chapter 644 applies only to “lost” property and the money here was mislaid property. The court awarded the money to the bank, holding that it was entitled to possession of the money to the exclusion of all but the true owner. The court also held that Benjamin was a “finder” within the meaning of chapter 644 and awarded him a ten percent finder’s fee. See id. § 644.13 (a finder of lost property is entitled to ten percent of the value of the lost property as a reward).
Benjamin appealed. He claims that chapter 644 governs the disposition of all found property and any common law distinctions between various types of found property are no longer valid. He asserts alternatively that even under the common law classes of found property, he is entitled to the money he discovered. He claims that the trial court should have found that the property was treasure trove or was lost or abandoned rather than mislaid, thereby entitling the finder to the property.
The bank and Lindner Aviation cross-appealed. Lindner Aviation claims that if the money is mislaid property, it is entitled to the money as the owner of the premises on which the money was found, the hangar where the plane was parked. It argues in the alternative that it is the finder, not Benjamin, because Benjamin discovered the money during his work for Lindner Aviation. The bank asserts in its cross-appeal that it owns the premises where the money was found — -the airplane — and that no one is entitled to a finder’s fee because chapter 644 does not apply to mislaid property.
II. Standard of Review.
This case was tried as an ordinary proceeding at law. Therefore, the standard of review is for correction of errors at law. Iowa R.App.P. 4; Kuehl v. Freeman Bros. Agency, Inc., 521 N.W.2d 714, 717 (Iowa 1994); Eldridge v. Herman, 291 N.W.2d 319, 321 (Iowa 1980).
Whether the money found by Benjamin was treasure trove or was mislaid, abandoned or lost property is a fact question. 1 Am.Jur.2d Abandoned, Lost, and Unclaimed Property § 41, at 49 (2d ed. 1994) (hereinafter “1 Am.Jur.2d Abandoned Property ”); cf. Bennett v. Bowers, 238 Iowa 702, 706, 28 N.W.2d 618, 620 (1947) (whether realty has been abandoned is a question of fact); Roberson v. Ellis, 58 Or. 219, 114 P. 100, 103 (1911) (whether money was hidden long enough to be classified as treasure trove was a fact question for the jury). Therefore, the trial court’s finding that the money was mislaid is binding on us if supported by substantial evidence. Iowa R.App.P. 14(f)(1); see Eldridge, 291 N.W.2d at 323 (affirming trial court’s finding that property was lost property because supported by substantial evidence).
III. Does Chapter 64-lp Supersede the Common Law Classifications of Found Property?
Benjamin argues that chapter 644 governs the rights of finders of property and abrogates the common law distinctions between types of found property. As he points out, lost property statutes are intended “to encourage and facilitate the return of property to the true owner, and then to reward a finder for his honesty if the property remains unclaimed.” Paset v. Old Orchard Bank & Trust Co., 62 Ill.App.3d 534, 19 Ill.Dec. 389, 393, 378 N.E.2d 1264, 1268 (1978) (interpreting a statute similar to chapter 644); accord Flood v. City Nat’l Bank, 218 Iowa 898, 908, 253 N.W. 509, 514 (1934), cert. denied, 298 U.S. 666, 56 S.Ct. 749, 80 L.Ed. 1390 (1936) (public policy reflected in lost property statute is “to provide a reward to the finder of lost goods”); Willsmore v. Township of Oceola, 106 Mich.App. 671, 308 N.W.2d 796, 804 (1981) (lost goods act “provides protection to the finder, a reasonable method of uniting goods with their true owner, and a plan which benefits the people of the state through their local governments”).2 These *405goals, Benjamin argues, can best be achieved by applying such statutes to all types of found property.
The Michigan Court of Appeals had an additional reason in Willsmore to apply the Michigan statute to all classes of discovered property. The Michigan court noted that the common law distinctions between categories of found property were embraced in Michigan after the enactment of its lost property statute. Willsmore, 308 N.W.2d at 803. Based on this fact, the Michigan court concluded that the legislature could not have intended to reflect in the term “lost property” distinctions not then in existence. Id. However, the Michigan court did not address the fact that the common law distinctions were first developed in England, before the enactment of most states’ lost property statutes.3 See Goodard v. Winchell, 86 Iowa 71, 52 N.W. 1124 (1892) (citing to English common law); Hurley v. City of Niagara Falls, 30 A.D.2d 89, 289 N.Y.S.2d 889, 891 (1968) (stating that common law principles relating to lost property were established as early as 1722).
Although a few courts have adopted an expansive view of lost property statutes, we think Iowa law is to the contrary. In 1937, we quoted and affirmed a trial court ruling that “the old law of treasure trove is not merged in the statutory law of chapter 515, 1935 Code of Iowa.” Zornes v. Bowen, 223 Iowa 1141, 1145, 274 N.W. 877, 879 (1937). Chapter 515 of the 1935 Iowa Code was eventually renumbered as chapter 644. The relevant sections of chapter 644 are unchanged since our 1937 decision. As recently as 1991, we stated that “[t]he rights of finders of property vary according to the characterization of the property found.” Ritz v. Selma United Methodist Church, 467 N.W.2d 266, 268 (Iowa 1991). We went on to define and apply the common law classifications of found property in deciding the rights of the parties. Id. at 269. As our prior cases show, we have continued to use the common law distinctions between classes of found property despite the legislature’s enactment of chapter 644 and its predecessors.
The legislature has had many opportunities since our decision in Zones to amend the statute so that it clearly applies to all types of found property. However, it has not done so. When the legislature leaves a statute unchanged after the supreme court has interpreted it, we presume the legislature has acquiesced in our interpretation. State v. Sheffey, 234 N.W.2d 92, 97 (Iowa 1975). Therefore, we presume here that the legislature approves of our application of chapter 644 to lost property only. Consequently, we hold that chapter 644 does not abrogate the common law classifications of found property. We note this position is consistent with that taken by most jurisdictions. See, e.g., Bishop v. Ellsworth, 91 Ill. App.2d 386, 234 N.E.2d 49, 51 (1968) (holding lost property statute does not apply to abandoned or mislaid property); Foster v. Fidelity Safe Deposit Co., 264 Mo. 89, 174 S.W. 376, 379 (1915) (refusing to apply lost property statute to property that would not be considered lost under the common law); Soven v. Yoran, 16 Or. 269, 20 P. 100, 105 (1888) (same); Zech v. Accola, 253 Wis. 80, 33 N.W.2d 232, 235 (1948) (concluding that if legislature had intended to include treasure trove within lost property statute, it would have specifically mentioned treasure trove).
In summary, chapter 644 applies only if the property discovered can be categorized as “lost” property as that term is defined under the common law. Thus, the trial court correctly looked to the common law classifications of found property to decide who had the right to the money discovered here.
*406IV. Classification of Found Property.
Under the common law, there are four categories of found property: (1) abandoned property, (2) lost property, (3) mislaid property, and (4) treasure trove. Ritz, 467 N.W.2d at 269. The rights of a finder of property depend on how the found property is classified. Id. at 268-69.
A. Abandoned property. Property is abandoned when the owner no longer wants to possess it. Cf. Pearson v. City of Guttenberg, 245 N.W.2d 519, 529 (Iowa 1976) (considering abandonment of real estate). Abandonment is shown by proof that the owner intends to abandon the property and has voluntarily relinquished all right, title and interest in the property. Ritz, 467 N.W.2d at 269; 1 Am.Jur.2d Abandoned Property §§ 11-14, at 15-20. Abandoned property belongs to the finder of the property against all others, including the former owner. Ritz, 467 N.W.2d at 269.
B. Lost property. “Property is lost when the owner unintentionally and involuntarily parts with its possession and does not know where it is.” Id. (citing Eldridge v. Herman, 291 N.W.2d 319, 323 (Iowa 1980)); accord 1 Am.Jur.2d Abandoned Property § 4, at 9-10. Stolen property found by someone who did not participate in the theft is lost property. Flood, 218 Iowa at 905, 253 N.W. at 513; 1 Am.Jur.2d Abandoned Property § 5, at 11. Under chapter 644, lost property becomes the property of the finder once the statutory procedures are followed and the owner makes no claim within twelve months. Iowa Code § 644.11 (1991).
C. Mislaid property. Mislaid property is voluntarily put in a certain place by the owner who then overlooks or forgets where the property is. Ritz, 467 N.W.2d at 269. It differs from lost property in that the owner voluntarily and intentionally places mislaid property in the location where it is eventually found by another. 1 Am.Jur.2d Abandoned Property § 10, at 14. In contrast, property is not considered lost unless the owner parts with it involuntarily. Ritz, 467 N.W.2d at 269; 1 Am.Jur.2d Abandoned Property § 10, at 14; see Hill v. Schrunk, 207 Or. 71, 292 P.2d 141, 143 (1956) (carefully concealed currency was mislaid property, not lost property).
The finder of mislaid property acquires no rights to the property. 1 Am. Jur.2d Abandoned Property § 24, at 30. The right of possession of mislaid property belongs to the owner of the premises upon which the property is found, as against all persons other than the true owner. Ritz, 467 N.W.2d at 269.
D. Treasure trove. Treasure trove consists of coins or currency concealed by the owner. Id. It includes an element of antiquity. Id. To be classified as treasure trove, the property must have been hidden or concealed for such a length of time that the owner is probably dead or undiscoverable. Id.; 1 Am.Jur.2d Abandoned Property § 8, at 13. Treasure trove belongs to the finder as against all but the true owner. Zornes, 223 Iowa at 1145, 274 N.W. at 879.
V. Is There Substantial Evidence to Support the Trial Court’s Finding That the Money Found by Benjamin Was Mislaid?
We think there was substantial evidence to find that the currency discovered by Benjamin was mislaid property. In the Eldridge case, we examined the location where the money was found as a factor in determining whether the money was lost property. Eldridge, 291 N.W.2d at 323; accord 1 Am. Jur.2d Abandoned Property § 6, at 11-12 (“The place where money or property claimed as lost is found is an important factor in the determination of the question of whether it was lost or only mislaid.”). Similarly, in Ritz, we considered the manner in which the money had been secreted in deciding that it had not been abandoned. Ritz, 467 N.W.2d at 269.
The place where Benjamin found the money and the manner in which it was hidden are also important here. The bills were carefully tied and wrapped and then concealed in a location that was accessible only by removing screws and a panel. These circumstances support an inference that the money was placed there intentionally. This *407inference supports the conclusion that the money was mislaid. Jackson v. Steinberg, 186 Or. 129, 200 P.2d 376, 378 (1948) (fact that $800 in currency was found concealed beneath the paper lining of a dresser indicates that money was intentionally concealed with intention of reclaiming it; therefore, property was mislaid, not lost); Schley v. Couch, 155 Tex. 195, 284 S.W.2d 333, 336 (1955) (holding that money found buried under garage floor was mislaid property as a matter of law because circumstances showed that money was placed there deliberately and court presumed that owner had either forgotten where he hid the money or had died before retrieving it).
The same facts that support the trial court’s conclusion that the money was mislaid prevent us from ruling as a matter of law that the property was lost. Property is not considered lost unless considering the place where and the conditions under which the property is found, there is an inference that the property was left there unintentionally. 1 Am.Jur.2d Abandoned Property § 6, at 12; see Sovem, 20 P. at 105 (holding that coins found in a jar under a wooden floor of a barn were not lost property because the circumstances showed that the money was hidden there intentionally); see Farrare v. City of Pasco, 68 Wash.App. 459, 843 P.2d 1082, 1084 (1993) (where currency was deliberately concealed, it cannot be characterized as lost property). Contrary to Benjamin’s position the circumstances here do not support a conclusion that the money was placed in the wing of the airplane unintentionally. Additionally, as the trial court concluded, there was no evidence suggesting that the money was placed in the wing by someone other than the owner of the money and that its location was unknown to the owner. For these reasons, we reject Benjamin’s argument that the trial court was obligated to find that the currency Benjamin discovered was lost property.
We also reject Benjamin’s assertion that as a matter of law this money was abandoned property. Both logic and common sense suggest that it is unlikely someone would voluntarily part with over $18,000 with the intention of terminating his ownership. The location where this money was found is much more consistent with the conclusion that the owner of the property was placing the money there for safekeeping. See Ritz, 467 N.W.2d at 269 (property not abandoned where money was buried in jars and tin cans, indicating a desire by the owner to preserve it); Jackson, 200 P.2d at 378 (because currency was concealed intentionally and deliberately, the bills could not be regarded as abandoned property); 1 Am. Jur.2d Abandoned Property § 13, at 17 (where property is concealed in such a way that the concealment appears intentional and deliberate, there can be no abandonment). We will not presume that an owner has abandoned his property when his conduct is consistent with a continued claim to the property. Linscomb v. Goodyear Tire & Rubber Co., 199 F.2d 431, 435 (8th Cir.1952) (applying Missouri law); Hoffman Management Corp. v. S.L.C. of N. Am., Inc., 800 S.W.2d 755, 762 (Mo.Ct.App.1990); Foulke v. New York Consolidated R.R., 228 N.Y. 269, 127 N.E. 237, 238 (1920); 1 Am.Jur.2d Abandoned Property §§ 14, 42, at 20, 49; cf. Bennett, 238 Iowa at 706, 28 N.W.2d at 620 (stating that there is no presumption that real property is abandoned). Therefore, we cannot rule that the district court erred in failing to find that the currency discovered by Benjamin was abandoned property.
Finally, we also conclude that the trial court was not obligated to decide that this money was treasure trove. Based on the dates of the currency, the money was no older than thirty-five years. The mint dates, the musty odor and the rusty condition of a few of the panel screws indicate that the money may have been hidden for some time. However, there was no evidence of the age of the airplane or the date of its last inspection. These facts may have shown that the money was concealed for a much shorter period of time.
Moreover, it is also significant that the airplane had a well-documented ownership history. The record reveals that there were only two owners of the plane prior to the bank. One was the person from whom the bank repossessed the plane; the other *408was the original purchaser of the plane when it was manufactured. Nevertheless, there is no indication that Benjamin or any other party attempted to locate and notify the pri- or owners of the plane, which could very possibly have led to the identification of the true owner of the money. Under these circumstances, we cannot say as a matter of law that the money meets the antiquity requirement or that it is probable that the owner of the money is not discoverable.
We think the district court had substantial evidence to support its finding that the money found by Benjamin was mislaid. The circumstances of its concealment and the location where it was found support inferences that the owner intentionally placed the money there and intended to retain ownership. We are bound by this factual finding.
VI.Is the Airplane Or the Hangar the “Premises” Where the Money Was Discovered?
Because the money discovered by Benjamin was properly found to be mislaid property, it belongs to the owner of the premises where it was found. Mislaid property is entrusted to the owner of the premises where it is found rather than the finder of the property because it is assumed that the true owner may eventually recall where he has placed his property and return there to reclaim it. Willsmore, 308 N.W.2d at 802; Foster, 174 S.W. at 378; Foulke, 127 N.E. at 238-39.
We think that the premises where the money was found is the airplane, not Lindner Aviation’s hangar where the airplane happened to be parked when the money was discovered. The policy behind giving ownership of mislaid property to the owner of the premises where the property was mislaid supports this conclusion. If the true owner of the money attempts to locate it, he would initially look for the plane; it is unlikely he would begin his search by contacting businesses where the airplane might have been inspected. Therefore, we affirm the trial court’s judgment that the bank, as the owner of the plane, has the right to possession of the property as against all but the true owner.4
VII. Is Benjamin Entitled to a Finder’s Fee?
Benjamin claims that if he is not entitled to the money, he should be paid a ten percent finder’s fee under section 644.13. The problem with this claim is that only the finder of “lost goods, money, bank notes, and other things” is rewarded with a finder’s fee under chapter 644. Iowa Code § 644.13 (1991). Because the property found by Benjamin was mislaid property, not lost property, section 644.13 does not apply here. The trial court erred in awarding Benjamin a finder’s fee.
VIII. Summary.
We conclude that the district court’s finding that the money discovered by Benjamin was mislaid property is supported by substantial evidence. Therefore, we affirm the district court’s judgment that the bank has the right to the money as against all but the true owner. This decision makes it unnecessary to decide whether Benjamin or Lindner Aviation was the finder of the property. We reverse the court’s decision awarding a finder’s fee to Benjamin.
AFFIRMED IN PART; REVERSED IN PART.
All justices concur except HARRIS, SNELL, and ANDREASEN, JJ., who dissent.. Chapter 644 was renumbered by the editors of the 1995 Iowa Code and is now found in chapter 556F.
. The Michigan statute had two provisions lacking in the Iowa lost properly statute. The Michigan law provided for registration of a find in a central location so that the true owner could *405locate the goods with ease. Willsmore, 308 N.W.2d at 803. It also required notice to potential true owners. Id. Because Iowa’s statute has no central registry and requires only posting and publication of notice, Iowa’s law does not accomplish as well the goal of reuniting property with its true owner. Finally, under the Michigan statute, the local government obtains one half the value of the goods. Id. Iowa's law does not include this public benefit.
. Iowa’s lost property statute was adopted in 1851 at Iowa's constitutional convention. Iowa Code ch. 51 (1851). It had earlier appeared in Revised Statutes of the Territory of Iowa ch. 158 (1843).
. Some jurisdictions require that one in possession of mislaid property use ordinary care to return the property to its owner. E.g., Kimbrough v. Giant Food Inc., 26 Md.App. 640, 339 A.2d 688, 696 (1975); see generally 1 AmJur.2d Abandoned Property § 24, at 31-32.