“This is a drawing made by Mrs. Millicent of a thing that her husband used as a paper-knife. It’s not been found since that night.”

Derrick took it eagerly and scrutinized the outline of a murderous-looking weapon. Its curving blade must have measured a foot, being chopped off at the point in a curious and characteristic fashion. The handle was heavy and carried a short guard. Its deadly curve was unmistakable.

“By George!” he said. “That’s a Malay creese!”

“Yes, Mr. Millicent got it in the East and seemed to attach some kind of sentimental value to it. He always kept it on his desk. Of course, it may be that it was there for protection, though the average man would have preferred a revolver. On the other hand, you can see what chance any one would have against a thing like that.”

“Then there are two assumptions,” answered Derrick thoughtfully, “one that the person who committed the crime knew that this thing was on the desk available for his purpose; the other, that he came without any evil intent, but a dispute developed and in a burst of anger he picked up the creese, and struck.”

“And there’s just one person to whom both of those cases might apply, at ten o’clock at night,” said Burke grimly, “the person against whom we have no evidence.”

“I agree with that. Did anything else disappear at the same time?”

“So far as we know only one thing, and that apparently not of any importance. It was a sort of little toy image, about three or four inches high, that Mr. Millicent used as a paper-weight. It was carved out of a block of jade. He used to joke about it in a queer sort of way and say it was more valuable than they knew. Sometimes it was on his desk, but only when he was in the room himself. At other times he used to hide it away; but no one ever knew where. He never talked about it, except in that joking manner. It seems to have been an ugly-looking thing, too, but Mrs. Millicent could not make a drawing of it.”

A sudden light danced in Derrick’s eyes. “Then there was no concealment about this?”

“No more than that it used to be stowed away, and he’d never allow it to be touched. You know how men sometimes get queer ideas about things?”