The taller man slipped a band of diamonds on his finger, turned it round, held the hand it graced at arm's length, then frowned, took off the ring, and tried the other.

Meantime his friend was called on for his opinion and advised sympathetically. Christopher pursed his lips scornfully. The two were like a pair of vain old peacocks and silly as women, thought he. How foolish for men to be wearing jewels, anyway. You wouldn't catch him arrayed in a big diamond ring. And the strangest part of it was that the man who was thus frittering away his money did not look at all like a fop but was tall, muscular, and had a scar, not unlike a sword cut, across his right cheek. It was a strange mark that ran from his ear almost to the corner of his mouth, and it gave his face a disagreeable, sinister expression.

His comrade was less robust—a small, wiry fellow, who seemed lost in the heavy coat he wore. In spite of the heat of the room, he had not turned down his collar, which all but concealed his face, and once Christopher noticed that he leaned surreptitiously forward and drew that of his companion higher about his ears. Thus they dallied, laughing, joking, objecting, until the distracted clerk, fearful lest he lose such promising customers, was well-nigh out of his wits. It seemed as if they never would be suited, and at last, suddenly inspired, the salesman dashed off to the farther end of the show case in evident search for something he had forgotten to show them.

It was during the instant he was thus occupied that Christopher saw, or thought he saw, the taller of the men wrench the ring he was wearing from his finger, drop it inside his glove, and substitute for it one his companion handed him. The exchange—if exchange it was—took place in a flash and was over so quickly the boy could scarcely believe his eyes. A second later the clerk returned triumphantly, displayed another ring, and renewed his attentions without noticing anything amiss. But his purchasers shook their heads, pushed the rings aside, and moved away.

Then, and not until then, was Christopher urged to action. He awakened as out of a dream, wondering whether what he had witnessed was real, and if it was, what he ought to do. The two fur-coated gentlemen were almost at the door. If he was to do anything at all, it must be now. Fortunately a stairway was at no great distance; and he raced down it as fast as his feet would carry him. When he reached the street floor, the door had, alas, closed on the suspected thieves. It came to him now how much wiser it would have been had he shouted from the balcony, instead of waiting to descend. If he had done that the men might have been stopped before they got away. But it was all so unbelievable that he hadn't the nerve to cry out. Had he been mistaken, a pretty sort of fool he would have appeared; besides, he had not thought of it. His bright ideas always seemed to come afterward.

Well, at any rate he was alert enough now. It took him no time to rush up to the perspiring clerk, who, discouraged, stood mopping his brow, and gasp:

"Those men—one of them took a ring—I saw him."

"What!"

"He did. He put it in his glove."

"But the rings are all here."