Towards the end came, Infessura tells us, a Hebrew physician who claimed to have a prescription by which he could save the Pope's life.

For his infusion( 1) he needed young human blood, and to obtain it he took three boys of the age of ten, and gave them a ducat apiece for as much as he might require of them.

Unfortunately he took so much that the three boys incontinently died of his phlebotomy, and the Hebrew was obliged to take to flight to save his own life, for the Pope, being informed of what had taken place, execrated the deed and ordered the physician's arrest.

"Judeus quidem aufugit, et Papa sanatus not est," concludes Infessura.
1 The silly interpretation of this afforded by later writers, that this physician attempted transfusion of blood--silly, because unthinkable in an age which knew nothing of the circulation of the blood--has already been exploded.
Innocent VIII breathed his last on July 25, 1492..