It seems to have been written soon after the dispute recorded by Vasari.

In it he states, that although he differs in many respects from the persons who had hitherto controlled the works, yet he thinks it better not to abandon them altogether, but to correct them, alter the superintendence, and put Montemellino at the head of the direction.

This would prevent the Pope from becoming disgusted with such frequent changes.

"If affairs took the course he indicated, he was ready to offer his assistance, not in the capacity of colleague, but as a servant to command in all things." Nothing is here said openly about Sangallo, who remained architect-in-chief until his death.

Still the covert wish expressed that the superintendence might be altered, shows a spirit of hostility against him; and a new plan for the lines must soon have been adopted.