"Be careful," I advised. "Thomson's probably underneath these paving stones."

Rose shivered a little.

"Do you think he wants to steal the jewels, Maurice?" she asked me.

"Oh, no!" I answered. "He probably wants to borrow them to wear at the Lord Mayor's show!"

She made a grimace.

"That's all very well, Mr. Lister," she said, with a great attempt at hauteur, "but will you kindly remember that you two are not in at this show? It is I who seem to be chosen as principal accomplice. I am not exactly infatuated with Mr. Kinlosti, but I don't want him to lose his jewels."

"I bet you a four-pound box of chocolates he does lose them," Leonard observed.

Rose sighed.

"Anyhow," she murmured, "we shall have to play 'Chu-Chin-Chow' to-night."

Leonard and Rose played a selection from "Chu-Chin-Chow" that evening as well as they could with an extemporised rendering. Rose played the piano, Leonard the violin, and I pretended to be turning over the pages of the music, although all the time I was engaged in a furtive search of the crowded lounge for some sign of our patron or a possible emissary. There were the usual little groups about, and a more harmless or obvious set of people I don't think I ever came across. Mrs. Cotesham was seated with her back to us, with a shawl arranged around her head so as to still further deaden sound, and ostentatiously reading a novel. Mr. Grant had stumped past us on his way to the billiard room, muttering to himself, before the first few bars of our little effort had been played. The others were nearly all known to us by name or reputation. There seemed something uncanny in the thought that somewhere or other were ears waiting for the message our selection conveyed. We were half-way through the "Cobbler's Song" when, without the slightest warning, Rose, who was facing the staircase, broke off abruptly in her playing. I caught sight of her face, suddenly pale, upturned towards the head of the staircase, followed the direction of her gaze, and was myself stricken dumb and nerveless. At the top of the staircase John was standing, holding out a terrified, struggling figure almost at arm's length. The fingers of his right hand seemed to be clasped around the neck of his unfortunate victim, while with his left hand he held him by the ankle. This was all in full view of the lounge. There were shrieks from the women, and some of the men, amongst them myself, hurried towards the staircase. We were too late, however, to be of any practical use. John, who seemed like a man beside himself with passion, suddenly swung the prostrate form of his captive a little farther back, and then dashed it from him down the stairs. A little cry of horror rippled and sobbed through the tense air. The man lay on the rug at the bottom of the stairs, a crumpled-up heap, motionless and without speech.