"I am a pupil of Mr. Bell's," Marley said, quietly. "Seven years ago he induced me to leave the Huddersfield police to go into his office, where I stayed until Mr. Bell gave up business, when I applied for and gained my present position. Curious you should mention Mr. Bell's name, seeing that he was here so recently as this afternoon."

"Staying in Brighton?" Steel asked, eagerly. "What is his address?"

"No. 219, Brunswick Square."

It took all the nerve that David possessed to crush the cry that rose to his lips. It was more than strange that the man he most desired to see at this juncture should be staying in the very house where the novelist had his great adventure. And in the mere fact might be the key to the problem of the cigar-case.

"I'll certainly see Bell," he muttered. "Go on, Marley."

"Yes, sir. We now proceed to the cigar-case that lies before you. It was also lying on the floor of your conservatory on the night in question. I suggested that here we might have found a clue, taking the precaution at the same time to ask if the article in question was your property. You looked at the case as one does who examines an object for the first time, and proceeded to declare that it was not yours. I am quite prepared to admit that you instantly corrected yourself. But I ask, is it a usual thing for a man to forget the ownership of a £70 cigar-case?"

"A nice point, and I congratulate you upon it," David said.

"Then we will take the matter a little farther. A day or two ago you were in dire need of something like £1,000. Temporarily, at any rate, you were practically at the end of your resources. If this money were not forthcoming in a few hours you were a ruined man. In vulgar parlance, you would have been sold up. Mossa and Mack had you in their grip, and they were determined to make all they could out of you. The morning following the outrage at your house you call upon Mr. Mossa and produce the cigar-case lying on the table before you. From that case you produce notes sufficient to discharge your debt—Bank of England notes, the numbers of which, I need hardly say, are in my possession. The money is produced from the case yonder, which case we know was sold to the injured man by Mr. Walen."

Marley made a long and significant pause. Steel nodded.

"There seems to be no way out of it," he said.