"Thank you, Mr. Burboyne. My friend and I would like a few minutes' private investigation in the study."
CHAPTER II
SIR CRICHTON DAVEY'S study was a small one, and a glance sufficed to show that, as the secretary had said, it offered no hiding-place. It was heavily carpeted, and over-full of Burmese and Chinese ornaments and curios, and upon the mantelpiece stood several framed photographs which showed this to be the sanctum of a wealthy bachelor who was no misogynist. A map of the Indian Empire occupied the larger part of one wall. The grate was empty, for the weather was extremely warm, and a green-shaded lamp on the littered writing-table afforded the only light. The air was stale, for both windows were closed and fastened.
Smith immediately pounced upon a large, square envelope that lay beside the blotting-pad. Sir Crichton had not even troubled to open it, but my friend did so. It contained a blank sheet of paper!
"Smell!" he directed, handing the letter to me. I raised it to my nostrils. It was scented with some pungent perfume.
"What is it?" I asked.
"It is a rather rare essential oil," was the reply, "which I have met with before, though never in Europe. I begin to understand, Petrie."
He tilted the lamp-shade and made a close examination of the scraps of paper, matches, and other debris that lay in the grate and on the hearth. I took up a copper vase from the mantelpiece, and was examining it curiously, when he turned, a strange expression upon his face.
"Put that back, old man," he said quietly.