(after stating the facts as above). Appellant has assigned ten alleged errors in this court, but he has argued only assignments numbered 1, 3, 4, 6, and 7. We shall therefore treat the other assignments as waived. Assignment number 1 challenges the rulings of the trial court in admitting oral testimony offered by defendant relative to an alleged agreement on plaintiff’s part to furnish a *524barn or a suitable place for bousing tbe cattle, it being appellant’s contention that, because tbe written contract contains a stipulation that defendant shall “feed and care for said stock at bis own expense and on said premises,” that such parol proof of an alleged agreement on plaintiff’s part to furnish suitable buildings was wholly inadmissible, and that the ruling admitting it constituted prejudicial error. In brief, appellant relies upon the well-settled rule which is embodied in statutory form in this state, that “the execution of a contract in writing, whether the law requires it to be written or not, supersedes all the oral negotiations or stipulations concerning its matter which preceded or accompanied the execution of the instrument.” Section 5333, Rev. Codes 1905. Appellant’s counsel argue that, by the terms of the written contract, defendant clearly and unequivocally agreed to “feed and care for said stock at his own expense,” and that therefore an oral stipulation that plaintiff should provide a shed or building in which the cattle might be properly housed and cared for, not only varied the terms of the written contract, but in part contradicted them.
Appellant’s contention is predicated upon the hypothesis that the stipulation aforesaid embraces, upon its face, the full and complete contract between the parties as to the care of the stock. We do not thru construe such clause, and we think it very apparent that the parties merely intended thereby to cover the defendant’s duty under the contract with reference to furnishing the feed, and feeding as well as generally looking after such stock, but they did not intend that his duty in this respect should extend to furnishing buildings in which to house the same. Such a construction of said clause is wholly unreasonable in the light of the subject-matter of the contract, the season of the year when it was entered into, being in the month of December, and the circumstances under which and the purposes for which the same was entered into. The defendant, in a sense, became, under the contract, a mere servant of plaintiff’s to cultivate his lands for a stipulated portion of the crops to be paid him by plaintiff, and to furnish feed for and to look after and care for the cattle, hogs, and sheep for a stipulated portion of the increase thereof, etc.; and it is wholly improbable, in view of all the circumstances, that it could have been the intention of the parties that defendant should supply, at his own expense, valuable fixtures or permanent improvements to plaintiff’s farm *525in the way of buildings in which to house said stock. It is, of course, true that such a contract, if entered into, would be perfectly legitimate and binding, but, as before stated, we do not thus construe'the stipulation in question. It is a well-settled rule for construing contracts, that “while the writing itself is the only criterion by which the intention of the parties is to be ascertained, yet it is not necessary that the incompleteness thereof should appear on its face from a mere inspection of it, for it is to be construed in the light of its subject-matter and the circumstances under which and the purposes for which it was executed.” 17 Cyc. 747, citing Potter v. Easton, 82 Minn. 247, 84 N. W. 1011; Wheaton Roller-Mill Co. v. John T. Noye Mfg. Co. 66 Minn. 156, 68 N. W. 854; Eighmie v. Taylor, 98 N. Y. 288.
In Wheaton Roller-Mill Co. v. John T. Noye Mfg. Co. supra, Mitchell, J., in speaking for the court, lays down what we deem a sound rule regarding the admission of evidence of parol stipulations not covered in the written contract, as follows: “All the authorities are substantially agreed that where, in the absence of fraud, accident, or mistake, the parties have deliberately put their contract into a writing which is complete in itself, and couched in such language as imports a complete legal obligation, it is conclusively presumed that they have introduced into the written instrument all material terms and circumstances relating thereto. But the point upon which the courts have sometimes differed is as to how the incompleteness of the written contract may be made to appear. Some cases seem to go to the length of holding that this may be done by going outside of the writing, and proving that there was a stipulation entered into, but not contained in it, and hence that only part of the contract was put in writing. If any such doctrine is to obtain, there would be very little left of the rule against varying written contracts by parol. Such is not the law. Other cases seem to go almost to the other extreme, by holding that the incompleteness of the writing must appear on the face of the document from mere inspection. But to furnish a basis for the admission of parol evidence the incompleteness need not be apparent on the face of the instrument. If the written contract, construed in view of the circumstances in which, and the purpose for which, it was executed, — which evidence is always admissible to put the court in the position of the parties, — shows that it was not meant to contain the whole bargain be*526tween the parties, then parol evidence is admissible to prove a term upon wbicb tbe writing is silent, and wbicb is not inconsistent with wbat is written; but, if it shows that tbe writing was meant to contain the whole bargain between tbe parties, no parol evidence can be admitted to introduce a term wbicb does not appear there. In short,, tbe true rule is that tbe only criterion of tbe completeness of tbe written contract as a full expression of tbe agreement of tbe parties is tbe writing itself; but, in determining whether it is thus complete, it is to be construed, as in any other case, according to its subject-matter and tbe circumstances under wbicb and tbe purposes for wbicb it was executed.”
Mr. Stephens in bis work on Evidence, chapter 12, § 2, states tbe rule as follows: There may be proved by parol “the existence of any separate oral agreement as to any matter on wbicb a document is silent, and wbicb is not inconsistent with its terms, if from tbe circumstances of tbe case tbe court infers that tbe parties did not intend tbe document to be a complete and final statement of tbe whole of tbe transaction between them.” Judge Mitchell, of tbe Minnesota court, approves the above as an accurate statement of tbe rule, but criticizes it as being indefinite as to wbat are “the circumstances of tbe case,” wbicb tbe court may consider in determining tbe completeness or incompleteness of tbe document.
In Lewis v. Seabury, 14 N. Y. 409, 30 Am. Rep. 311, a written lease bad been entered into between tbe parties, containing a clause that tbe plaintiff should make all “improvements and repairs” necessary to be made on tbe premises during tbe continuance of her term, and that such improvements and repairs should be left on tbe premises at tbe end of tbe term, but it contained no stipulation regarding tbe furnishing of fixtures by tbe defendant. Tbe plaintiff was tbe lessee, and she sued to recover for a breach of an alleged oral contract or stipulation by defendant to furnish certain fixtures for tbe premises. It was insisted by tbe defendant that tbe written lease was conclusive of tbe contract, and precluded any evidence of an alleged oral agreement as-to fixtures. In passing upon tbe points thus raised, it was held: “The case is undoubtedly very near the line, but I am inclined to think that such parol agreement was a separate and indepo-.lent one, touching a subject not covered by tbe lease, and made for an independent con*527sideration paid by tbe plaintiff not stipulated for or referred to in tbe lease. Tbe promise that certain specific fixtures tben on tbe premises should be retained and remain there, so that tbe plaintiff might enjoy tbe benefit of it, if she took tbe lease, may be sustained as a previous distinct collateral agreement upon a collateral and independent consideration which did not merge in tbe subsequent written contract of hiring.” Citing Erskine v. Adeane, L. R. 8 Ch. 756, 42 L. J. Ch. N. S. 835, 29 L. T. N. S. 234, 21 Week. Rep. 802; Morgan v. Griffith, L. R. 6 Excb. 70, 40 L. J. Exch. N. S. 46, 23 L. T. N. S. 738, 19 Week. Rep. 957; Hope v. Balen, 58 N. Y. 380. In addition to tbe foregoing, we call attention to certain provisions of our Civil Code which we deem more or less applicable. Section 5351, Rev. Codes 1905, provides: “A contract may be explained by reference to tbe circumstances under which it was made and tbe matter to which it relates.” Also § 5352, as follows: “However broad may be tbe terms of a contract, it extends only to those things concerning which it appears that tbe parties intended to contract.”
In tbe light of these rules, tbe point here in question is not difficult to decide. We think the evidence of the parol promise of plaintiff to furnish a suitable building or buildings for housing said stock was admissible, as such evidence in no manner tended to change, contradict, or vary the terms of the written contract, as the subject-matter of such parol agreement or stipulation is not and was not intended by the parties to be covered by the stipulation declaring that defendant should feed and care for such stock at his own expense. See also 17 Cyc. 720, wherein it is said: “The existence of a written lease does not preclude parol evidence of a collateral agreement between the lessor and the lessee, unless it is inconsistent with or contradictory to the terms of the written instrument. Thus it may be shown that there was an independent agreement of the lessor to make certain repairs or to provide certain fixtures, a warranty as to the condition of the premises, or a contemporaneous promise of the landlord that the adjoining premises shall not be used in a manner inconsistent with the convenient use of the demised premises.”
We have examined the case of Johnson v. Kindred State Bank, 12 N. D. 336, 96 N. W. 588, as well as the other North Dakota authorities cited by appellant, but we find nothing therein which conflicts with *528the foregoing rules. Defendant laid a sufficient foundation in bis answer for proving such alleged oral agreement and plaintiff’s breach thereof.
We have passed upon the foregoing point, not because we deem its decision of very material or controlling importance as to the questions involved on this appeal, but we do so in view of our conclusion that, for reasons hereafter stated, we deem it incumbent upon us to order another trial of the action. We are loath to disturb the verdict of the jury, but in view of the condition of the record we feel that there is no other alternative. The testimony, which is unnecessarily voluminous, is a veritable jumble, with no pretense of orderly or logical arrangement, while the instructions of the court to the jury are strikingly devoid of proper rules to guide the jury in disposing of the various issues submitted to it. As a necessary result, the verdict of the jury is but little more than a mere guess. It would serve no useful purpose to set out the instructions in full in this opinion. Suffice it to say that, in the main, they consist merely of a statement of the contentions of the parties as disclosed by the pleadings, followed by the statement that each party has the burden of establishing the things alleged by him by a fair preponderance of the evidence. Also a few mere cautionary instructions to the jurors to the effect that they are the judges of the facts and of the credibility of the witnesses, and giving certain general rules for determining such credibility. Then follows the statement in this language: “There is another dispute that I might call your attention to, and that is the dispute as to whether or not there was an oral contract entered into between Mr. Prouty and Mr. Putnam at the same time that exhibit A was entered into regarding the buildings and regarding the board of the men. The exact nature of that dispute you have heard, and when you are settling the other disputes it will be a part of your duty to settle the disputes regarding those different items.” Also that they must find whether in the fall of 1906 the instalment due on the note had been paid, “for the reason,” as stated, “that the plaintiff alleges that the note was in default at the time that he took possession of the property, and that that was the reason he took possession, . If the note was overdue and unpaid at that time, that is the instalment of it at least that was due. Mr. Putnam would be entitled to the possession of the property in order to enforce his lien against *529his security, and that is the reason that'that is material.” The jury was given no light whatever to guide it in determining such questions, nor was it informed in any manner as to the effect upon their decision of a finding either way upon the existence of the alleged parol agreement relative to the furnishing of buildings by Putnam for housing said stock, although they were advised by the court that it was a material matter for them to decide. The pleadings disclose a controversy over the ownership and right to the possession of 5 horses, 2 colts, 2 binders, 1 drill, 1 gang plow, 1 mower, 1 rake, 1 disc, 12 sheep, 1,500 bushels of oats, 1,000 bushels of speltz, 200 bushels of Durum wheat, 225 bushels Fife wheat, 75 bushels flax, 8 sets of harness, and 25 tons of hay; but the instructions ignored, and in effect eliminated, everything except the five horses and machinery. The jury, however, by their verdict, found that plaintiff was entitled to the possession of the' sheep, oats, speltz, wheat, and hay described in the complaint; but did not, by such verdict, determine the ownership thereof. They also found that defendant was, at the time of the commencement of the action, entitled to the possession of the horses, colts, harness, and machinery described in the complaint, and fixed the value thereof at the sum of $800, and the damages which defendant suffered by the taking and detention thereof by plaintiff at the sum of $1,400. The instructions wholly failed to enlighten the jury as to any rule by which they should be guided in determining such value and damages, nor were they instructed as to the law or rules which they should apply in determining whether or not the instalment due on said note in the fall of 1906 had been paid. Defendant did not contend that he ever paid the same in cash, but merely that he had a set-off thereto consisting of labor theretofore performed and board furnished to plaintiff, aggregating an amount more than sufficient to pay and satisfy such instalment.
In view of the fact that the jury, by their verdict, awarded to plaintiff the possession of the sheep, oats, speltz, wheat, and hay, he probably cannot claim prejudicial error on account of the action of the court in omitting to submit such issues to the jury, although they should have been instructed to determine the ownership of such property and also the right to the possession thereof.
The action involves merely the ownership and right to the possession of the personalty described in the complaint; and it does not occur to *530us tbat tbe questions as to whether plaintiff orally agreed to furnish buildings for the stock, or as to whether the cattle died from freezing or starvation, or as to the degree of care and prudence exercised by defendant in looking after the cattle, have any materiality in so far as the right to the possession of the horses, colts, harness, and machinery are concerned. Defendant held such property under a contract to purchase the same, and his right thereto did not in any way depend upon the continuance in force of the other portion of the contract. They probably have a material bearing, however, upon the right to the possession of the other property, for if plaintiff had fulfilled his part of the contract and defendant was grossly negligent in the care of said stock, this no douht would furnish plaintiff grounds for canceling the contract. On the contrary, if defendant was in no way at fault for the condition of said stock, no right of cancellation would exist, even though defendant may have voluntarily permitted plaintiff to remove said cattle from the farm. We might here add, in view of another trial, that even though plaintiff made the oral stipulation to furnish a new barn or buildings for the cattle, his failure so to do would not exonerate defendant from using due care, under the circumstances, to protect such stock from freezing to death. In other words, plaintiff’s breach of such oral agreement or stipulation, if proved, would not necessarily constitute the sole or proximate cause of the loss of the cattle. If defendant could, by the exercise of due care, have saved such stock from dying by protecting them in some reasonable way from the extreme weather, he was required to do so.'
However, on this appeal we are concerned merely with that portion of the judgment which is in defendant’s favor, awarding to him the possession of the horses, colts, harness, and machinery or their value, $800, in case a delivery.cannot be had, and the sum of $1,400 damages for the talcing and detention thereof, and were it not for the reasons herein mentioned, we would feel obliged to affirm such judgment. We áre agreed, however, that appellant’s criticisms of the instructions as a whole are well taken. As before stated, such instructions fail to cover any of the material questions in the case as they should, and it is quite apparent that the jury was misled and confused by those which were given. While it is no doubt true, as we have held on several oc*531casions, that it is not reversible error to omit to instruct on some particular point in tbe case in tbe absence of a request so to do, still we tbink tbe law of the case should, at least in a general way, be covered to tbe end that tbe jury may receive reasonable aid and enlightenment upon tbe essential and controlling questions in controversy, and a total failure to thus charge will result in a mistrial, and this is especially true where, as in tbe case at bar, it appears at least doubtful whether substantial justice has been meted out by tbe verdict. See Moline Plow Co. v. Gilbert, 3 Dak. 239, 15 N. W. 1; Owen v. Owen, 22 Iowa, 270; Forzen v. Hurd, 20 N. D. 42, 120 N. W. 224; Barton v. Gray, 57 Mich. 622, 24 N. W. 638.
Tbe amount of tbe damages awarded for tbe detention of tbe property appears to be somewhat excessive; but whether this is true or not we need not here decide, for we are convinced that this portion of tbe verdict has no sufficient basis for its support in tbe evidence. Such damages are based exclusively upon the value of the use of tbe property between tbe time of tbe commencement of tbe action and the trial, and tbe testimony from which tbe finding is made is to tbe effect that during a portion of each of tbe years the horses were worth a certain sum per day. In other words, tbe net value of their use for each year or during tbe entire period is not shown. Manifestly it would be unjust to merely show tbe earning capacity or reasonable value of such property for a part of tbe time without also showing what tbe cost would be of feeding and caring for tbe same during tbe remainder of tbe period.
In view of our conclusions as above announced, we deem it unnecessary to notice tbe other assignments. Tbe alleged errors therein complained of will probably not arise on another trial.
Tbe judgment and order appealed from are reversed, and a new trial ordered.
BuuKE, J., being disqualified, took no part in tbe above decision.