"I think so," replied Eve politely.

"Well, I'm not so sure," said Mr. Prohack, reflectively. "What about this one?" And he picked up and tried upon Eve another and a larger necklace.

"That," said the original expert, "is two thousand four hundred guineas."

"It seems cheap," said Mr. Prohack carelessly. "But there's something about the gradation that I don't quite like. What about this one?"

Eve opened her mouth, as if about to speak, but she did not speak. The wall, which had trembled for a few seconds, regained its monumental solidity.

"Five thousand guineas," said the expert of the third necklace.

"Hm!" commented Mr. Prohack, removing the gewgaw. "Yes. Not so bad. And yet—"

"That necklace," the expert announced with a mien from which all deference had vanished, "is one of the most perfect we have. The pearls have, if I may so express it, a homogeneity not often arrived at in any necklace. They are not very large of course—"

"Quite so," Mr. Prohack stopped him, selecting a fourth necklace.

"Yes," the expert admitted, his deference returning. "That one is undoubtedly superior. Let me see, we have not yet exactly valued it, but I think we could put it in at ten thousand guineas—perhaps pounds. I should have to consult one of the partners."