[i] This cause is before us upon a petition for rehearing. The opinion 'because of which the rehearing is sought appears in 45 S. D. 3, 184 N. W. 978. Reference to same is made for an understanding of the nature of the case and the issues *12raised. We feel constrained to refer to that part of the petition for rehearing that was prepared by Attorney A. A. Brown. There is much therein which we are certain counsel, upon mature reflection, will concede has no proper place in a petition addressed to this court or to any other court. 'Some of the matters urged therein might with propriety have been addressed to the trial court upon an application for a change of venue or for postponement of the cause; but even that part is foreign to the record 'herein, and never should have appeared in such petition.
[2] It would appear from the petition for- rehearing that defendant feels deeply humiliated because of some of the statements in our former opinion; and, because this matter'is so urgently suggested 'by counsel in their petition, we feel justified in referring to same. In our opinion we used the expression, “When Nicholson put his cross to this agreement, if he ever did.” In the petition it is urged that this court erred in assuming “that the claim that deceased signed the contract was in dispute.” Petitioner is in error. In its instructions, the trial court stated, “Plaintiff, however, denies that Nicholson executed said instruments;” and, in several places, such court gave instructions prefaced with the words, “If you find that Nicholson did sign, the instruments.” In view of the fact that we were affirming this case on another ground, we did not feel called upon to pass on the issue as to the signing of the instruments. 'We therefore used the expression of Which petitioner complains so as not to intimate any opinion upon this disputed fact. Neither did' this court intend to imply that defendant’s failure to conform the written contract to Nicholson’s instructions was 'because of any intent to mislead Nicholson. Nothing said in our opinion warrants such inference. That the contract very materially differed from such instructions cannot be disputed.
[3] It, however, appears from the conceded facts that, prior to the bringing of this action, there had been no attempt to rescind the instruments executed by the deceased. This action is neither one based on a rescission nor one brought to procure a decree of rescission. It therefore was incumbent upon the plaintiff, under section 86, R. C. 1919, to prove, by competent evidence, that deceased was, at the time he executed the above papers, “entirely without understandng.” 13 C. J. 242. In the instructions given *13to the jury by the trial court, the jury was very clearly advised that it must find for defendant unless - it found Nicholson was “entirely without understanding” at the time these papers were executed. Appellant assigned as ground for' reversal that there was “no evidence showing or tending to show that the deceased did not have sufficient mental capacity to reasonably understand the nature and effect of what he was doing when he signed the contract;” he wholly failed, either in his written or oral argument, to refer to the instruction, which was the law of the case, which, as above noted, was that the jury must find for defendant unless deceased was “entirely without understanding.” Because of the - above fact, we failed to consider the evidence in the true light of such instruction. Having re-examined the record in the light of the law of this case upon the trial, we are of the opinion that there was no evidence “which ought reasonably to satisfy a jury” that deceased was “entirely without understanding.” Drew v. Lawrence, 37 S. D. 620, 159 N. W. 274.
[2, 3] Under these circumstances, should we grant a rehearing or should we withdraw our former opinion and reverse the trial court? We have no doubt of the inherent power of this court to either modify or withdraw an opinion at any time so long as it retains jurisdiction of the case. 'We are satisfied that we are as fully conversant with the record as we could possibly be after a reargument. We should then withdraw our former opinion and reverse the lower court unless we feel that there was evidence from which reasonable men might find that Nicholson never signed the instruments. We are therefore called upon to determine that which on the former opinion we refrained from expressing our views upon. There is no direct evidence that Nicholson did not sign the papers; hut there is the direct evidence of three witnesses, one apparently uninterested, that Nicholson. -did sign them. The only -contention that -could be urged by plaintiff is that, from defendant’s own evidence, the jury might have been warranted in finding that Nicholson was physically able to have signed his name., and that, a mark having been used in place of his name, the jury might infer that Nicholson did not make such mark. In the light of all the evidence, we do not deem such an inference reasonable.
The former opinion of this court is withdrawn, and the judgment and order appealed from are reversed.