use your eyes. Ah, if only people had used their eyes sooner!"
They followed him, and he pointed to a framework of carved wood that connected the four posts.
"What is this on the frieze running above the capitals of the little Ionic pillars?"
"The papal crown and keys," said Mary.
"Good! Now regard the other side."
"A coat of arms—a golden bull on a red ground—why, father, that was what puzzled you at Florence!"
"Surely it was. The thing stuck in my memory, yet I could not remember where I had seen it before."
Signor Mannetti prepared for his effect, then made it.
"The arms of the Borgia! The arms of the Spanish Pope, Alexander VI. of unholy memory. So all is told, and we will soon go to bed. Having marked them this morning, you will see how readily I was led into the heart of the secret. It only needed some such certain sign. And everything that had happened was consonant with this explanation. The first to suffer puzzled me; but I solved that problem, too. You shall hear how each woman and each man was slain. Look at this mattress upholstered in satin—there lies the unsleeping thing that brings sleep so quickly to others! I guessed it this morning; I proved it to-night. At seventeen minutes past eight Prince was dead; but not until I awoke, near two o'clock, did I dare approach him. For how did he die? The moment the heat of his ancient body pene-
