The Beggerlys appeal the district court’s order granting the motion to dismiss by the United States and denying the Beggerlys’ cross-motion for summary judgment in which they sought to vacate a consent judgment under which the United States acquired title to property previously held by the Beggerlys. Concluding that the Beggerlys are entitled to the relief sought, we reverse and remand.
BACKGROUND
On April 3, 1950 Clark M. Beggerly, Sr., on behalf of his family, bought a portion of Horn Island, offshore in the Gulf of Mexico, at a tax sale in Jackson, Mississippi. On January 8,1971 Congress enacted legislation authorizing the Department of Interior to establish a federal park on lands that included Horn Island.1 In 1972 the National Park Service began negotiating with the Beggerlys for the purchase of their property on Horn Island. In October 1975 the Beggerlys entered into a contract to sell the land to the government for $156,500. Subsequently the government canceled the contract contending that because it had never issued a land patent, it was the title owner of Horn Island.
In 1979 the government brought a quiet title action in the Southern District of Mississippi against the Beggerlys and other defendants. During discovery the Beggerlys sought proof of their title, and .government officials ostensibly conducted a thorough search of the public land records. The government then formally represented to the Beggerlys and the district court that no part of Horn Island had ever been granted to a private landowner and, as a result of these representations, in 1982 the government persuaded the Beggerlys to accept a settlement agreement it proposed. The district court entered judgment based upon that agreement; the Beggerlys received $208,175.87 and title was quieted in favor of the United States.2
Their disappointment with the results of the settlement led the Beggerlys to mount an exhaustive search for a land patent to support their claim of title. They wrote letters to public officials, made Freedom of Information Act requests, and searched land records in Alabama, Mississippi, Louisiana, and Washington, D.C. Finally, in 1991 the Beggerlys hired a genealogical record specialist who conducted research in the National Archives and discovered the Boudreau Grant which supported the Beggerlys’ claim of title. Government officials reportedly had searched the National Archives during the quiet title suit but had not discovered this document and thereafter erroneously advised the court and the Beggerlys that Horn Island had never been privately disposed. The Beggerlys contacted the Bureau of Land Management requesting the issuance of a land patent for Horn Island. The BLM summarily denied their request.
The Beggerlys then filed the instant action on June 1, 1994 seeking to set aside the consent judgment and to recover just compensation. The government moved to dismiss the complaint, invoking Fed.R.Civ.P. 12(b)(6) and 12(b)(1). The Beggerlys filed a cross-motion for summary judgment and filed an amended motion to add the Tucker Act3 and the Quiet Title Act4 as jurisdictional bases. The district court granted the government’s motion to dismiss and denied the Beggerlys’ cross-motion for summary judgment and motion to amend. The Beggerlys timely appealed.
ANALYSIS
1. Sovereign Immunity
The government contends that sovereign immunity bars the Beggerlys from proceeding with an independent action in equity. The government relies on Zegura v. United States5 in which we held that sovereign immunity barred a bill of review brought to vacate a prior judgment obtained by the United States. The Eleventh Circuit viewed Zegura as controlling authority for the proposition that an independent action could not *487be brought against the government absent a waiver of sovereign immunity.6 We are not so persuaded and do not find Zegura as controlling herein. Zegura dealt only with a bill of review, which is a type of equitable action that has been replaced by the motions enumerated in Fed.R.Civ.P. 60(b). Although an independent action in equity is similar to a bill of review and its modern successors— the Rule 60(b) motions — it is nonetheless a different action. Rule 60(b) makes the distinction clear, stating that it does not “limit the power of a court to entertain an independent action.” We therefore conclude that Zegura does not control in the independent action context.
We have held that an independent action filed in the same court that rendered the original judgment is a continuation of the original action for purposes of subject matter jurisdiction.7 It would be anomalous to torpedo a party bringing the independent action with a plea of sovereign immunity when the action is in reality a continuation of the original lawsuit in which jurisdiction was not an issue. To allow the government to use sovereign immunity as a shield where it previously has invoked the court’s jurisdiction and prevailed based upon its misrepresentations, negligence, or mistake would do unacceptable violence to our basic notions of justice. We therefore agree with our colleagues in the Second Circuit and now conclude and hold that governmental consent is not required to bring an independent action in the same court as the original action.8
2. The Independent Action
The elements of an independent action are:
(1) a judgment which ought not, in equity and good conscience, to be enforced; (2) a good defense to the alleged cause of action on which the judgment is founded; (3) fraud, accident, or mistake which prevented the defendant in the judgment from obtaining the benefit of his defense; (4) the absence of fault or negligence on the part of the defendant; and (5) the absence of any adequate remedy at law.9
The Beggerlys have satisfied these elements. We now hold that the district court erred as a matter of law in denying the Beggerlys’ action to vacate the consent judgment. Crucial to that determination is our conclusion that the district court erred in failing to recognize the validity of the Boudreau Grant. That document is an English translation of a 1781 Spanish land grant in which the Governor General of Spanish Louisiana conveyed Horn Island to Catarina Boudreau. Although the available document is not the original grant, it is the only copy available, presumably because a fire destroyed the Spanish West Florida archives where the original Spanish version would have been stored. The Supreme Court has held that a certified translation of a Spanish land grant may be used to prove the existence of a grant where the original cannot be found or has been destroyed.10 We therefore find and conclude that the English translation is the best evidence of the original grant and is admissible to prove its existence.
The government contended at oral argument that the Boudreau Grant was merely an application for a land patent. In the early 19th century Congress established land commissions to organize the private claims of landowners, in what are now the states of Louisiana, Mississippi, Alabama, and Florida, who had acquired their property from England, France or Spain. Heirs of Catarina Boudreau presented the Boudreau Grant to the land commissioner for claims east of the Pearl River. It was not accepted. The land commissioners were responsible for ascertaining titles and claims but did not have the authority to adjudicate title. The controlling statute required that the commissioners submit claims to Congress for final action.11 *488We must therefore conclude that the land commissioner’s refusal to accept the application did not conclusively determine that Horn Island belonged to the United States.
It is abundantly clear that the land commissioners did not have the authority to confiscate property rightfully owned by private individuals. It is well-settled that, absent a specific congressional act, land validly granted by a foreign nation remained privately owned after the United States acquired political control of the subject area. Chief Justice John Marshall taught:
The modern usage of nations, which has become law, would be violated; that sense of justice and of right which is acknowledged and felt by the whole civilized world would be outraged, if private property should be generally confiscated, and private rights annulled. The people change their allegiance; their relation to their ancient sovereign is dissolved; but their relations to each other, and their rights of property, remain undisturbed.12
Articles II and III of the treaty consummating the Louisiana Purchase, under which the United States acquired property south of the 31st parallel where Horn Island is located,13 expressly protected the rights of private landowners. We consider it beyond serious debate that if the Boudreau Grant was a valid land grant under the Spanish law of 1781, then Horn Island remained private property after the Louisiana Purchase. If, however, the grant was incomplete or invalid under Spanish law, then the land commissioner was justified in his rejection. We inquire, therefore, as to the validity of the Boudreau Grant under Spanish law at the time it was made. The summary judgment record contains an affidavit by Professor Hans Baade, offered by the Beggerlys as evidence that the Boudreau Grant was complete and valid under the Spanish law of 1781. On the record before us the Boudreau Grant vested complete and valid title in Catarina Boudreau. On that record, therefore, we must conclude that the property at issue herein remained privately owned after the Louisiana Purchase and did not enter the public domain of the United States until the misrepresentation-based consent judgment of 1982.
The government possessed a document that was vital to the Beggerlys’ claim of title to the land they had acquired on Horn Island. Notwithstanding, it represented to the Beggerlys and to the district court that no evidence existed that Horn Island had ever been privately owned. This representation precipitated the Beggerlys’ involuntary settlement of the government’s lawsuit. Then-inability to prove their title was directly caused by the government’s failure to produce the grant and its misrepresentation the no private disposal had ever been made. Equity permits us to correct injustice in extraordinary and unusual circumstances such as are- here presented. We exercise that authority and as to the Beggerlys set aside the challenged consent judgment as null and void ab initio.14
3. Quiet Title Act Claim
The Beggerlys filed a motion to amend their complaint to claim relief under the Quiet Title and Tucker Acts. The district court denied that motion. We read the Beggerlys’ complaint and motion for summary judgment as stating alternative causes of action. Although the district court did not have jurisdiction over an inverse condemnation action under the Tucker Act,15 it did have jurisdiction to adjudicate title under the Quiet Title Act. We conclude that the district court abused its discretion and should have allowed the Beggerlys to amend then-complaint because “[t]he requested amendment would have done no more than state an alternative jurisdictional basis for recovery upon the facts previously alleged.”16
The record reflects that the Beggerlys legally acquired a part of Horn Island in a tax sale. Because we have set aside the earlier judgment as to the Beggerlys and *489have found that the United States has no legitimate claim to the land, the validity of the Beggerlys’ title is a legal certainty. The government maintains, however, that a claim under the Quiet Title Act is barred unless it is commenced within 12 years of the date on which it accrued.17 A claim is deemed to accrue on the date the plaintiff knows or should have known about the claim of the United States.18 The Beggerlys knew about the claim at the earliest in 1976 when the government ceased contract negotiations with them for the purchase of their Horn Island property. More than 12 years passed before the Beggerlys commenced the current action; however, a statute of limitations may be tolled on equitable grounds. “Equitable tolling applies principally where the plaintiff is actively misled by the defendant about the cause of action or is prevented in some extraordinary way from asserting his rights.”19 On the record before us the government may not benefit from the limitations period, especially in light of the diligence displayed by the Beggerlys in seeking the truth and pursuing their rights, which resulted in their discovering a grant that apparently not even custodians of the public land records could or would locate. We conclude that the limitations period was tolled from the time the Beggerlys began searching for evidence of a private disposal during the original quiet action until they discovered the Boudreau Grant and, thus, that their action manifestly was filed within the 12-year limitations period.
We remand to the district court so that it may enter judgment quieting title in favor of the Beggerlys. Under 28 U.S.C. § 2409a(b) the United States has the option of delivering possession of the 729 acres claimed by the Beggerlys or it may elect to retain possession thereof and pay the Beggerlys just compensation for same. The district court is to take into account the compensation of $208,-175.87 received by the Beggerlys in the 1982 settlement. The judgment of the district court is REVERSED and judgment is RENDERED in favor of the Beggerlys and this cause is REMANDED for further proceedings consistent herewith.
. 16 U.S.C. § 459h.
. United States v. Adams, No. S79-0338(R) (S.D.Miss. Dec. 3, 1982).
. 28 U.S.C. §§ 1346, 1491.
. 28 U.S.C. § 2409a.
. 104 F.2d 34 (5th Cir.), cert. denied, 308 U.S. 586, 60 S.Ct. 109, 84 L.Ed. 490 (1939).
. United States v. Timmons, 672 F.2d 1373 (11th Cir.1982).
. West Virginia Oil & Gas Co. v. George E. Breece Lumber Co., 213 F.2d 702 (5th Cir.1954).
. Weldon v. United States, 70 F.3d 1 (2d Cir.1995).
. Bankers Mortgage Co. v. United States, 423 F.2d 73 (5th Cir.) (quoting National Sur. Co. v. State Bank, 120 F. 593, 599 (8th Cir.1903)), cert. denied, 399 U.S. 927, 90 S.Ct. 2242, 26 L.Ed.2d 793 (1970).
. United States v. Delespine's Heirs, 37 U.S. (12 Pet.) 654, 9 L.Ed. 1232 (1838).
. Act of April 25, 1812, 2 Stat. 713; see generally United States v. Percheman, 32 U.S. (7 Pet.) 51, 8 L.Ed. 604 (1833).
. Percheman at 86-87.
. United States v. Louisiana, 363 U.S. 1, 363 U.S. 121, 80 S.Ct. 961, 4 L.Ed.2d 1025, 4 L.Ed.2d 1096 (1960); Foster v. Neilson, 27 U.S. (2 Pet.) 253, 7 L.Ed. 415 (1829), overruled on other grounds by Percheman.
. We note that there are no fixed time limitations on bringing an independent action in equity. In re West Texas Mktg. Corp., 12 F.3d 497 (5th Cir.1994).
. See 28 U.S.C. §§ 1346, 1491 (vesting exclusive jurisdiction in the Federal Court of Claims for claims exceeding $10,000).
. Miller v. Stanmore, 636 F.2d 986, 990 (5th Cir.1981).
. 28 U.S.C. § 2409a(g).
. Id.
. Rashidi v. American President Lines, 96 F.3d 124, 128 (5th Cir.1996). Equitable tolling may be applied against the United States. Irwin v. Department of Veterans Affairs, 498 U.S. 89, 111 S.Ct. 453, 112 L.Ed.2d 435 (1990).