"She is to stay here in London, then?" asked Ricardo.
"Oh, yes; she is not to go. She will present her letters at the Opera House and secure an engagement, if she can. The criminals might be lulled thereby into a belief that the girl had kept the whole strange incident to herself, and that there was nowhere even a knowledge of the disguise which they had used." Hanaud spoke as carelessly as if the matter was not very important; and Ricardo, with an unusual flash of shrewdness, said:
"It is clear, my friend, that you do not think those two men will ever be caught at all."
"There is always a chance. But listen. There is a room with a hundred guns, one of which is loaded. Outside the room there are a hundred pigeons, one of which is white. You are taken into the room blind-fold. You choose the loaded gun and you shoot the one white pigeon. That is the value of the chance."
"But," exclaimed Ricardo, "those pearls were of great value, and I have heard at a trial expert evidence given by pearl merchants. All agree that the pearls of great value are known; so, when they come upon the market----"
"That is true," Hanaud interrupted imperturbably. "But how are they known?"
"Exactly," replied Hanaud. "But did you not also hear at this trial of yours that pearls can be peeled like an onion? No? It is true. Remove a skin, two skins, the weight is altered, the pearl is a trifle smaller. It has lost a little of its value, yes--but you can no longer identify it as the so-and-so pearl which belonged to this or that sultan, was stolen by the vizier, bought by Messrs. Lustre and Steinopolis, of Hatton Garden, and subsequently sold to the wealthy Mrs. Blumenstein. No, your pearl has vanished altogether. There is a new pearl which can be traded." He looked at Ricardo. "Who shall say that those pearls are not already in one of the queer little back streets of Amsterdam, undergoing their transformation?"
Mr. Ricardo was not persuaded because he would not be. "I have some experience in these matters," he said loftily to Hanaud. "I am sure that we shall lay our hands upon the criminals. We have never failed."
Hanaud grinned from ear to ear. The only experience which Mr. Ricardo had ever had was gained on the shores of Geneva and at Aix under Hanaud's tuition. But Hanaud did not argue, and there the matter rested.