"Wait," said Arnold quickly. "All these things I can disprove by an alibi. I was at my rooms till nearly half-past nine, as my landlady, Mrs. Varney, can prove. I then went down and finished acting the part, when Hart was unexpectedly taken ill."

"But you were at the house," said Bocaros savagely. "Yes; later. But Mrs. Brand was murdered before nine by your own showing, professor, so you can prove nothing against me."

"I can make your doings on that night public," said the other, feeling the money slipping away from him.

"Hardly, unless you want to find yourself in a very unpleasant position, my good man."

"What do you mean?"

"I mean that Mrs. Brand left a diary behind her, which was discovered by me and Mr. Tracey. In it, she relates your visits to her--and you paid more than two, professor."

"What if I did visit her?" said Bocaros, the perspiration rising on his forehead. "She was my cousin, and----"

"And you had every right to do so. Quite so. But had you a right to tell her about Fane?"

"Fane?" stammered the Greek, completely taken aback.

"Yes. You knew before July that Fane and Brand were one and the same."