"Right, sir!" Tracey rose and looked wistfully down at the dead. "I guess the man who did that would be lynched in our country."
"He'll be hanged in this when found," retorted Derrick. "Go, please."
When the American was out of the room the inspector resumed his examination. Mulligan returned when he was in the middle of a brown study. "There's nothing to be seen, sir," he reported. "No one in the house. Doors and windows all bolted and barred. Not a sign."
"Strange," mused Derrick. "You are sure that the man who came out of the house was speaking with you while the singing was going on?"
"I'll take my oath on it, sir. He can't be guilty."
"Did he strike you as being confused?"
"Not very, sir. He didn't want his face to be seen, though, and kept his hat down on his eyes. He said the lady who was singing was his sister, and that he often came to see her."
"H'm! Why should he come to a house which is shut up?"
"He had the latch-key."
"Hand it over to me," said Derrick, and when in possession of it, took a long look at the size and shape. "New," said he, rapping it on his knuckles. "Hasn't been used much."