The defendants W. H. Horne and the North Carolina Bank and Trust Company denied the plaintiff’s alleged priority of liens and filed a cross-bill praying reformation of the instruments under which the plaintiff claims. It is not questioned that courts of equity have jurisdiction to correct written instruments which have been erroneously framed so that they shall express the real meaning and’intention of the parties; but the plaintiff denies that the evidence is sufficient to justify the reformation of his papers. This position calls for an inspection of the record in the light of principles administered in courts of equitable jurisdiction.
The doctrine of reformation is usually applied to cases in which there has been mutual mistake of the parties or mistake by one of the parties and fraud by the other. This equity extends to the draftsman who writes the agreement. Sills v. Ford, 171 N. C., 733.
The phrase “mutual mistake” means a mistake common to all the parties to a written instrument and usually relates to a mistake concerning its contents or its legal effect. Eaton on Equity, sec. 315; 2 Story’s Equity Jurisprudence (14th ed.), see. 978. Pomeroy defines “mistake” as a mental condition, conception, or conviction of the understanding which influences the will and leads to some outward physical manifestation. It is distinguished from fraud by the absence of knowledge and intention. He classifies mistakes as those of fact and those of law, suggesting that it is sometimes difficult to ascertain whether in a particular instance the mistake is purely one of law or one of law and fact in combination. 2 Pomeroy’s Equity Jurisprudence, sec. 839 et seq. A mistake of law simpliciter, “pure and simple,” is not adequate ground for reformation; but if a mistake of law is induced or accompanied by inequitable conduct of the other party equity will interpose its aid and *209administer relief. Ibid., secs. 842, 845. No single formula includes all varieties of fraud, but tbe general term is broad enough to include any act, omission, or concealment in breach of an equitable duty, for in equity many acts are deemed fraudulent which in law are not generally so considered.
Of course mistake or fraud may be established by parol evidence on the familiar principle that mistake, fraud, surprise, and accident furnish exceptions to the general rule that parol evidence is not admissible to vary the terms of a written instrument. Lee v. Brotherhood, 191 N. C., 359; Gray v. Mewborn, 196 N. C., 770.
Tested by these principles the evidence offered by the defendants as ground for reformation was appropriately submitted to the jury. It tends to show that before the contract in question was made Horne told the president of Hubbard and Company that he had given the bank a crop lien for $15,000 to which the plaintiff’s lien must be subordinate; that before signing the papers he noticed the omission of this provision and mentioned the fact to the plaintiff’s agent; that the agent knew that the lien previously given to the bank had not been legally registered and lulled Horne into a sense of security by saying that the question of priority would be determined by the registration of the respective liens; that Horne learned of the defective registration in the fall of 1930; and that he would not have executed the plaintiff’s papers had he been informed of all the facts.
Unquestionably there is evidence in support of the plaintiff’s contention that Horne signed the papers with knowledge of all the circumstances; but as a legal proposition we are concerned only with the obvious fact that different inferences may reasonably be drawn from the testimony — inferences favorable to the plaintiff and others favorable to the defendants. In these circumstances the plaintiff’s motion to dismiss the cross-bill as in case of nonsuit was properly denied. Warehouse Co. v. Ozment, 132 N. C., 839; King v. Hobbs, 139 N. C., 170; Bank v. Redwine, 171 N. C., 559; Hunter v. Sherron, 176 N. C., 226.
We are of opinion, however, that in his instructions the trial judge made an error which was prejudicial to the plaintiff. Only the third and fourth issues were submitted to the jury, and these were intended to embrace the elements which enter into the doctrine of reformation. It is a settled principle that all the essential elements must be proved by evidence which is clear, strong, and convincing. A bare preponderance of evidence is-not enough. My v. Early, 94 N. C., 1; King v. Hobbs, supra; Cedar Works v. Lumber Co., 168 N. C., 391; Lloyd v. Speight, 195 N. C., 179. Whether the evidence is of this character is a matter to be determined by the jury. Archer v. McClure, 166 N. C., 140; Sills v. Ford, supra.
*210The elements of equitable relief, instead of being embodied in a single issue, were separated into parts and submitted in two distinct issues. Let us concede that with, reference to the fourth issue the court correctly stated the quantum of proof: was it correctly stated in reference to the third ? As to the latter the court gave this instruction: “If the defendants have satisfied you by the greater weight of the evidence that there was such an agreement, then it would be your duty to answer the first (third) issue yes.” The plaintiff excepted for the assigned reason that the proof must have been, as on the fourth issue, clear, cogent, and convincing.
The defendants say that the error, if any, was harmless, that the third issue is formal and was intended merely to give the background of the case, and, indeed, that it may be disregarded because all essential elements are contained in the fourth issue. If the third issue had been omitted this argument would have been more persuasive. The “agreement” in the third issue and the “provision” in the fourth are not necessarily synonymous. If they are, the instructions on the two' issues are inconsistent. Which of them did the jury follow? If they are not synonymous, the fourth issue cannot be treated as a mere illumination of the third. The agreement must have been established as a necessary element of relief before a “provision” based upon the agreement could be made a part of the written instrument.
For error in the charge the plaintiff is entitled to a new trial on the third and fourth issues only, the others having been answered by consent. Benton v. Collins, 125 N. C., 83; Lumber Company v. Branch, 158 N. C., 251.
New trial.