I watched Benson with increased interest as his fastidiously exploring hand went down inside the burglar's opened waistcoat. I saw him feel there, and as he did so I caught a change of expression on our prisoner's face. He looked worried and harassed by this time; he seemed to have lost his tranquil and snake-like assurance. His small, lean head with the pathetically eager eyes took on a rat-like look. I knew then the end toward which my mind had been groping. The man was not snake-like. He was rat-like. He was a cornered rat. Rat seemed written all over him. But at that moment my eyes went back to Benson, for I had seen his hand bringing away a small vase partly wrapped in a pocket-handkerchief. This handkerchief was extremely dirty. I took the vase from his hand, drawing away the rag that screened it. Only by an effort, as I did so, was I able to conceal my surprise. For one glance at that slender little column of _sang-de-boeuf_ porcelain told me what it was. There was no possibility of mistake. One glimpse of it was enough. It was from the Gubtill collection. For once before my fingers had caressed the same glaze and the same tender contours. Once before, and under vastly different circumstances, I had weighed that delicate tube of porcelain in my contemplative hands. I sat back and looked at it more carefully. I examined the crackled groundwork, with its brilliant mottled tones, and its pale ruby shades that deepened into crimson. I peered down at the foot of enameled white with its slowly deepening tinge of pale green. Then I looked up at the delicate lip, the lip that had once been injured and artfully banded with a ring of gold. It was a vase of the K'angshi Period, a rare and beautiful specimen among the Lang Yao monochromes. And history said that thirty years before it had been purchased from the sixth Prince of Pekin, and had always been known as "The Flame."