"Do you mean to say," I exclaimed, "that these little heads are made of human skin?"

"Undoubtedly. Human skin and human hair. What else did you think?"

I looked at him with a puzzled frown and finally said that I did not understand what he meant.

"Have you never heard of the Mundurucú Indians?" he asked.

I shook my head. "What about them?" I asked.

"You will find an account of them in Bates' "Naturalist on the Amazon," and there is a reference to them in Gould and Pyle's "Anomalies.""

There was a pause, during which I gazed, not without awe, at the open boxes. Finally I looked at Challoner and asked, "Well?"

"Well, these are examples of the Mundurucú work."

I looked again at the boxes and I must confess that, as my eye traveled along the rows of impassive faces and noted the perfect though diminutive features, the tiny ears, the bristling hair, the frowning eye-brows—so discordant with the placid expression and peacefully closed eyes—a chill of horror crept over me. The whole thing was so unreal, so unnatural, so suggestive of some diabolical wizardry. I looked up sharply at my host.

"Where did you get these things, Challoner?" I asked.