“That the woman who committed the murder came back here and tried to find out what was going on. She found the room deserted, and entered.”

“There were two of them,” said Chick, pointing to a lock of black curly hair on the floor, “and one was a man, and Maynard grappled with him.”

“Exactly,” said Nick, “and some one let her in, or let them in, rather.”

“And that some one knew that Maynard was being murdered!”

“It’s a puzzle,” replied Nick. “I can’t for the life of me see how the Great Diamond Syndicate got into action here so quickly.”

“Money,” said Chick.

“I guess the chief thief didn’t exaggerate much when he told me of the efficiency of his gang,” said Nick.

The detective made a little package of the articles he wished to take with him, and the two descended to the office floor. The night clerk was nowhere in sight. The day clerk was all attention.

“A strange thing has just happened,” he said. “Our night elevator boy was badly injured near here by the falling of a heavy jar from a high window. He had been out on some errand, it seems, and was returning.”