He added that a certain Fra Cherubino would be useful, if any matter of grave moment were resolved on; nor did he reject the assistance of other discreet persons.

Giacomo, on his side, produced a Fra Domenico; and the four accomplices set at work to destroy the reigning Pope by means of sorcery.

They caused a knife to be forged, after the model of the Key of Solomon, and had it inscribed with Cabalistic symbols.

A clean virgin was employed to spin hemp into a thread.

Then they resorted to a distant room in Giacomo's palace, where a circle was drawn with the mystic thread, a fire was lighted in the center, and upon it was placed an image of Pope Urban formed of purest wax.