“An honest mistake of the law as to the effect of an instrument on the part of both contracting parties, when such mistake operates as a gross injustice to one, and gives an unconscionable advantage to the other, may be relieved in equity.” Code, § 37-204. “A mistake of law by the draftsman or other agent, by which the contract, as executed, does not fulfill or violates the manifest intention of the parties to the agreement, may be relieved in equity.” § 37-205. “The negligence of the complaining party, preventing relief in equity, is that want of reasonable prudence, the absence of which would be a violation of legal duty. Relief may be granted even in cases of negligence by the complainant, if it appears that the other party has not been prejudiced thereby.” § 37-212. “A court of equity will reform a contract of sale when, from mutual mistake or mistake common to both parties, an instrument does not express the true agreement of the parties.”
W. P. Brown &c. Lumber Co.
v.
Echols,
200
Ga.
284, 286 (
It is contended by the plaintiff in error that — under the principles of law above stated, as well as a long line of decisions of this court to the same effect, cited in counsel’s brief — the trial court erred in sustaining the demurrer raising the question of laches. In applying the facts of the instant case to the question here under consideration, other provisions of the law must be considered. “Mistake reliev'able in equity is some unintentional act, or omission, or error, arising from ignorance, surprise, imposition, or misplaced confidence. This power shall be exercised with caution, and to justify it the evidence shall be clear, unequivocal, and decisive as to the mistake.” Code,
*6
§ 37-202. “In determining whether there has been laches, there are various things to be considered, notably the duration of the delay in asserting the claim, and the sufficiency of the excuse offered in extenuation of the delay, whether plaintiff acquiesced in the assertion or operation of the corresponding adverse claim, the character of the evidence by which plaintiff’s right is sought to be established, whether during the delay the evidence of the matters in dispute has been lost or become obscured or the conditions have so changed as to render the enforcement of the right inequitable, whether third persons have acquired intervening rights.”
Cooper
v.
Aycock,
199
Ga.
658, 666 (
It was incumbent upon the plaintiffs in error in this case, construing the pleadings most strongly against them, to show that their cause of action was not barred by laches. See
Johnson
v. Sears, 199
Ga.
432 (
It follows from what has been said above that there was no error in sustaining the demurrer raising the question of laches. Thé language of the lease simply gives to the lessee the right to renew the lease as it exists for an additional period of five years. This being true, it was not error to exclude the evidence with reference to the alleged mutual mistake, and to direct a verdict in favor of the counter-affidavit.
Since the judgment of the trial court is being affirmed, no ruling will be made on the questions presented by the cross-bill.
Judgment affirmed on the main bill. Cross-bill dismissed.
