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 dreams of suspecting, that person's the one who has committed the robbery."

"Why, you'll be suspecting myself next! Lady Maclure cried, with some disgust.

"Your ladyship's just the last person in the world I should think of suspecting," the detective answered, with a deferential bow—which, after his previous speech, was to say the least of it equivocal.

Persis began to get annoyed. She didn't half like the look of that girl Bertha, herself; but still, she was there as Lady Maclure's guest, and she couldn't expose her hostess to discomfort on her account.

"The girl shall not be searched," she put in, growing hot. "I don't care a cent whether I lose the wretched stones or not. Compared to human dignity, what are they worth? Not five minutes' consideration."

"They're worth just seven years," Mr. Gregory answered, with professional definiteness. "And as to searching, why, that's out of your hands now. This is a criminal case. I'm here to discharge a public duty."

"I don't in the least mind being searched," Bertha put in obligingly, with an air of indifference. "You can search me if you like—when you've got a warrant for it."

The detective looked up sharply; so also did Persis. This ready acquaintance with the liberty of the subject in criminal cases impressed her unfavourably. "Ah! we'll see about that," Mr. Gregory answered, with a cool smile. "Meanwhile, Lady Maclure, I'll have a look at the boxes."

search (strictly illegal) brought out nothing. Mr. Gregory returned to Persis's bedroom, disconsolate. "You can leave the room," he said to Bertha; and Bertha glided out. "I've set another man outside to keep a constant eye on her," he added in explanation.

By this time Persis had almost made her mind up as to who was the culprit; but she said nothing overt, for Lady Maclure's sake, to the detective. As for that immovable official, he began asking questions—some of them, Persis thought, almost bordering on the personal. Where had she been last night? Was she sure she had really worn the rubies? How did she come home? Was she certain she took them off? Did the maid help her undress? Who came back with her in the carriage?

To all these questions, rapidly fired off with cross-examining acuteness, Persis answered in the direct American fashion. She was sure she had the rubies on when she came home to Hampstead, because Sir Justin O'Byrne, who came back with her in his sister's carriage, had noticed them the last thing, and had told her to take care of them.

At mention of that name the detective smiled meaningly. (A meaning smile is stock-in-trade to a detective.) "Oh, Sir Justin O'Byrne!" he repeated, with quiet self-constraint. "He came back with you in the carriage, then? And did he sit the same side with you?"

Lady Maclure grew indignant (that was Mr. Gregory's cue). "Really, sir," she said, angrily, "if you're going to suspect gentlemen in Sir Justin's position, we shall none of us be safe from you."

"The law," Mr. Gregory replied, with an