My new customer arrived in a taxi-cab as I was on the point of making up my mind to go; he dragged across the pavement a large bag of green baize.

"Sorry I'm behindhand," he remarked, exhaustedly.

"I, too, am inclined to regret it."

"Had to wait," he explained, "until my sisters went upstairs. We needn't lose any time now. I will pay the driver whilst you look over the articles."

Everything seemed in good condition, and it was clear that the silver had been treasured and polished carefully. I set each piece on a sideboard and estimated the value roughly, adding up the amounts in my head. The professor had returned, and he stood watching me with some impatience, as my lips moved in the effort of reckoning.

"How much?" he asked.

"I shall have to weigh—"

"No, no," he interrupted urgently. "Give me a fair sum, and let me have the money now. I'm not used to adventures of this nature, and I want to get the matter over."

"You will take a cheque?"

"I would rather have had cash," he said, "but, in these days, that is too much to expect. Make it payable to bearer, and not crossed." I mentioned that I had about thirty pounds, as it happened, in Treasury notes, and part payment could be made with these; he shook his head and said that, on consideration, he preferred to take the cheque. I suggested an amount: he agreed to it so swiftly that I blamed myself for not quoting a lesser sum. He gazed over my shoulder as I filled in the slip. Snatching at it, he, without another word, hurried from the shop.