Odd paused; he certainly would ask no questions of the concièrge, but she might, of her own accord, throw some light on Hilda’s devious ways.

“No; I had hoped to find her. Mademoiselle was in when I last called with her sister. I did not know that she went out every afternoon.”

Odd thought this tactful, implying, as it did, that Miss Archinard’s friends were not in ignorance of her habits.

“Every afternoon, monsieur; elle et son chien.”

“Ah, indeed!” Odd wished her good day and walked off. He had stumbled upon a mystery only Hilda herself might divulge: it might be very simple, and yet a sense of anxiety weighed upon him.

At five he went to call on a pleasant and pretty woman, an American, who lived in the Boulevard Haussmann. He was to dine with the Archinards, and Katherine had said she might meet him at Mrs. Pope’s; if she were not there by five he need not wait for her. She was not there, and Mr. Pope took possession of him on his entrance and led him into the library to show him some new acquisitions in bindings. Mrs. Pope was not a grass widow, and her husband, a desultory dilettante, was always in evidence in her graceful, crowded salon. He was a very tall, thin man, with white hair and a mild, almost timid manner, dashed with the collector’s eagerness.

“Now, Mr. Odd, I have a treasure here; really a perfect treasure. A genuine Grolier; I captured it at the La Hire sale. Just look here, please; come to the light. Isn’t that a beauty?”

Mrs. Pope, after a time, came and captured Peter; she did not approve of the hiding of her lion in the library. She took him into the drawing-room, where a great many people were drinking tea and talking, and he was passed dexterously from group to group; Mrs. Pope, gay and stout, shuffling the pack and generously giving every one a glimpse of her trump. It was a fatiguing process, and he was glad to find himself at last in Mrs. Pope’s undivided possession. He was sitting on a sofa beside her, talking and drinking a well-concocted cup of tea, when a picture on the opposite wall attracted his attention. He put down the cup of tea and put up his eyeglasses to look at it. A woman in a dress of Japanese blue, holding a paper fan; pink azaleas in the foreground. The decorative outline and the peculiar tonality made it unmistakable. He got up to look more closely. Yes, there was the delicate flowing signature: “Hilda Archinard.”

He turned to Mrs. Pope in pleased surprise.

“I didn’t know that Hilda had reached this degree of popularity. You are very lucky. Did she give it to you?”