This faith in her perplexing brother was so perfect that I never ventured to oppose it. We could not have remained friends had I questioned either his truth or ability.

Madam Izabel I saw but seldom, as she avoided the society of the family and preferred the seclusion of her own apartments. On the rare occasions of our meeting she treated me with frigid courtesy, resenting any attempt upon my part to draw her into conversation.

For a time it grieved me that Dom Miguel’s daughter should regard me with so much obvious dislike and suspicion. Her sad story had impressed me greatly, and I could understand how her proud nature had resented the slanders of Francisco Paola, and writhed under them. But one evening an incident occurred that served to content me with Madame Izabel’s aversion, and led me to suspect that the Minister of Police had not been so guilty as I had deemed him.

It was late, and Dom Miguel had preceded me to the domed chamber while I carried the records and papers to be deposited within the vault.

After raising the first trap my employer, as usual, extinguished the candle. I heard the customary low, grating noise, but before the shooting of the bolts reached my ears there was a sharp report, followed by a vivid flash, and turning instantly I beheld Madam Isabel standing beside us, holding in her hand a lighted match and peering eagerly at the surface of the trap.

My eyes followed hers, and while Dom Miguel stood as if petrified with amazement I saw the glitter of a gold ring protruding from one of the many curious indentations upon the plate. The next instant the match was dashed from her grasp and she gave a low cry of pain.

“Light the candle!” commanded de Pintra’s voice, fiercely.

I obeyed. He was holding the woman fast by her wrist. The ring had disappeared, and the mystery of the trap seemed as inscrutable as ever.

Dom Miguel, greatly excited and muttering imprecations all the way, dragged his daughter through the passage and up the stairs. I followed them silently to the chief’s study. Then, casting the woman from him, de Pintra confronted her with blazing eyes, and demanded:

“How dare you spy upon me?”