went away without warning on Thursday night I was dogging Mayes!"

Hewitt nodded, with no sign of surprise. "And the man killed in the barn?"

"That is one more of his thousand crimes, without a doubt. Though it differs. Do you know what drew my attention to the murders of the men Denson and Mason, and so set me thinking? In each case the murder was by strangulation, and the medical evidence at the inquests showed that it was effected by means of a tourniquet. In fact, in the second case, the tourniquet itself was left behind."

"Yes," Hewitt replied, "I loosened it myself—but, unfortunately, I was too late."

"Well, now," Peytral went on, "in Hayti, in my time, Mayes's enemies had a habit of dying suddenly in the night, by strangulation, and a tourniquet was always the instrument. And just as murder was quite a popular procedure in that accursed place, so strangulation by tourniquet became for a while the most common form of the crime. It was rapid, effective, and silent, you see. So that a murder by tourniquet, quite an unknown thing in this country, took my attention at once, and when another followed it so soon, I felt something like certainty. And the triangle was suggestive, too."