"Any one waiting for me?" he inquired of Styles, who came to the door.

"Yes, sir; a young man; name, Hines. Says he's an electrician."

"That's the man I want. Where is he?"

"In the parlor, sir."

"Good! I'll see him. But don't let any one else in. Anybody upstairs?"

"No, sir, all gone. Shall I go up or stay here?"

"You'd better go up. I'll look after the door."

Styles nodded, and went toward the stairs, up which he presently disappeared. Mr. Gryce proceeded to the parlor.

A dapper young man with an intelligent eye rose to meet him. "You sent for me," said he.

The detective nodded, asked a few questions, and seeming satisfied with the replies he received, led the way into Mr. Adams's study, from which the body had been removed to an upper room. As they entered, a mild light greeted them from a candle which, by Mr. Gryce's orders, had been placed on a small side table near the door. But once in, Mr. Gryce approached the larger table in the centre of the room, and placing his hand on one of the buttons before him, asked his companion to be kind enough to blow out the candle. This he did, leaving the room for a moment in total darkness. Then with a sudden burst of illumination, a marvellous glow of a deep violet color shot over the whole room, and the two men turned and faced each other both with inquiry in their looks, so unexpected was this theatrical effect to the one, and so inexplicable its cause and purpose to the other.