In the respondent’s brief, prepared by Mr. Frank Richards, assistant attorney general, we 'find the following statement of the case and discussion of the several grounds of appeal urged by appellant:

“Furthermore, lack of effective aid of counsel cannot be determined in coram nobis proceedings.

“People v. Smith, 109 Cal.App.2d 76 [ 239 P.2d 903 ].

“Defendant states that the true facts are that he was a chronic alcoholic and had a psychopathic personality and that these facts were not presented to the court through no lack of diligence on his part.

“As we have hereinabove pointed out, defendant withdrew his plea of not guilty by reason of insanity after he had talked with the doctors and believed that he was sane at the time of the commission of the offense to which he pleaded guilty. The mere fact that his attorney advised and persuaded him to withdraw his plea of not guilty by reason of insanity does .not constitute a sufficient basis for issuing a writ of error coram nobis.

“See: People v. Ynostroza, 105 Cal.App.2d 332, 333 [ 232 P.2d 913 ].

“Defendant states that he pleaded guilty by mistake due to his misapprehension of the legal effect of withdrawing his plea of not guilty by reason of insanity and therefore the legal proceedings against him resolved into extrinsic fraud.

“During the entire proceedings in court defendant was represented by his own private counsel; and even so, the court was solicitous of defendant’s understanding of the legal effect of withdrawing his several pleas to the charges set forth in the information. It was only after defendant stated to the court that it was his desire to withdraw his plea of not guilty by reason of insanity to each count and enter a plea of guilty to count one, that he believed that he was sane at the time he committed this offense, that nobody had persuaded or forced him against his will or had made any promise of reward or hope of immunity or leniency to change his plea, that the court granted permission to defendant to withdraw his plea. This is not a case which involves extrinsic fraud.

“In People v. Devora, 105 Cal.App.2d 457, 463 [ 233 P.2d 653 ], it is stated:

“ In view of the record herein which shows that defendant was fully informed by the court and therefore aware of the legal effects of withdrawing his plea of not guilty by reason of insanity and pleading guilty to count one of the information, his petition for a writ of error coram nobis was properly denied.”

The foregoing is a fair and adequate presentation of the case on appeal. It fully answers the sole question whether there was substantial evidence in the hearing in the trial court to support the finding, implicit in the order appealed from, that appellant, at the time he withdrew his plea of not guilty and his plea of not guilty by reason of insanity, and entered a plea of guilty to one count, acted voluntarily and understandingly.

We have reviewed the record and are satisfied that the trial court’s finding has ample support in the evidence. In addition to the portions of the record quoted by the attorney general we find other passages in the reporter’s transcript which-further dispute appellant’s contention that he did not understand the import of what he was doing when he withdrew his plea of not guilty by reason of insanity. Immediately prior to the withdrawal of the plea the court stated: “This is on the issue of insanity.” Whereupon defendant’s attorney, Gladys T. Root, stated: “If your Honor please, the defendant now, on advice of counsel, is willing to withdraw his plea of not guilty and withdraw the plea of not guilty by reason of insanity, the District Attorney being disposed now to allow us to enter a plea of guilty to the one count, if we withdraw the insanity plea.” Thereupon the defendant pleaded guilty to the prior convictions. The court then asked: “Mr. Costello, you understand that heretofore you have withdrawn the plea of not guilty to each count of the information and that you are standing at the present moment on the plea of insanity. It is your desire, is it, to withdraw that plea of not guilty by reason of insanity to each count, and enter a plea of guilty to Count 1, is that right ? ” to which the defendant answered: “Yes.” Then followed the further colloquy quoted in the respondent’s brief. We do not see *486 what more the court could have done to make it clear to the appellant that he was abandoning his claim of insanity.

The determination of this factual question in the light of the record is conclusive upon the appeal. We may add, however, that while appellant is unskilled in the law it is evident from the briefs he has written on the appeal that he is possessed of a high degree of intelligence and understanding.

The purported appeal from the judgment is dismissed.

The order is affirmed.

Wood (Parker), J., and Vallée, J., concurred.