“Of whom?”

“Villasca.”

“Ah!”

“He has sworn to kill you.”

The professor had been listening. He understood Spanish very well, and now he cried:

“I told you, Frank! We should get out of Madrid at once.”

Frank motioned for him to be silent.

“I presume Villasca is enraged because I was fortunate in saving you—because I happened to kill the bull when he failed.”

“That is one reason; but there is another.”

“Another?”