Lewison, whose flaxen hair and light blue eyes almost served to mask his Semitic origin, shrugged his shoulders in a fashion incongruous in one of his complexion, though characteristic in one of his name.

"It is as you say, Mr. Meyerstein, an example of early Tûlun-Nûr work," he said. "It may be sixteenth century or even earlier. The Kûren treasure-chest in the Hague Collection has points of similarity, but the workmanship of this specimen is infinitely finer."

"In a word, gentlemen," snapped Nayland Smith, rising from the arm-chair in which he had been sitting, and beginning restlessly to pace the room, "in a word, you would be prepared to make me a substantial offer for this box?"

Mr. Meyerstein, his shrewd eyes twinkling behind the pebbles of his pince-nez, straightened himself slowly, turned in the ponderous manner of a fat man, and readjusted the pince-nez upon his nose. He cleared his throat.

"I have not yet seen the interior of the box, Mr. Smith," he said.

Smith paused in his perambulation of the carpet and stared hard at the celebrated art dealer.

"Unfortunately," he replied, "the key is missing."

"Ah!" cried the assistant, Lewison, excitedly, "you are mistaken, sir! Coffers of this description and workmanship are nearly always complicated conjuring tricks; they rarely open by any such rational means as lock and key. For instance, the Kûren treasure-chest to which I referred, opens by an intricate process involving the pressing of certain knobs in the design, and the turning of others."

"It was ultimately opened," said Mr. Meyerstein, with a faint note of professional envy in his voice, "by one of Christie's experts."

"Does my memory mislead me," I interrupted, "or was it not regarding the possession of the chest to which you refer, that the celebrated case of 'Hague versus Jacobs' arose?"