"Because Silva expected to use both hands, till he learned that Swain had injured one of his. But for that, the blood needed to make the prints would have come from the victim, and Silva would have worn this glove, too; but Swain's injury gave Silva a happy inspiration! Wonderful man!" he added, half to himself.
Goldberger and Simmonds went on into the inner room to arrange for the disposition of the body of Mahbub; but Godfrey and Miss Vaughan and I turned back together, for we did not wish to see the Thug. At her boudoir door Godfrey paused.
"The case is clear," he said, "from first to last, provided you can supply us with a final detail, Miss Vaughan."
"What is that?" she asked.
"Did you write that note to Swain in your own room?"
"Yes."
"And will you show me the table at which you wrote it?"
"Certainly," and she opened the door. "Come in. I wrote it at that little desk by the window."
Godfrey walked to it, picked up a blotting-book which lay upon it, and turned over the leaves.
"Ah!" he said, after a moment. "I was sure of it. Here is the final link. Have you a small hand-mirror, Miss Vaughan?"