“They are important, believe me,” the doctor stopped him. “And you have it still, this hair?” he asked.

“It disappeared in the oddest way,” the Colonel explained. “It was curious looking stuff, something like asbestos, and I sent it to be analysed by the local chemist. But either the man got wind of its origin, or else he didn’t like the look of it for some reason, because he returned it to me and said it was neither animal, vegetable, nor mineral, so far as he could make out, and he didn’t wish to have anything to do with it. I put it away in paper, but a week later, on opening the package⁠—it was gone! Oh, the stories are simply endless. I could tell you hundreds all on the same lines.”

“And personal experiences of your own, Colonel Wragge?” asked John Silence earnestly, his manner showing the greatest possible interest and sympathy.

The soldier gave an almost imperceptible start. He looked distinctly uncomfortable.