The wind was shaking the windows, and whistling about the building with demoniacal fury as if seeking admission; the band played a popular waltz; and in and out of the open doors came and went groups representative of many ages and many nationalities.

"Ferrara," began Sime slowly, "was always a detestable man, with his sleek black hair, and ivory face. Those long eyes of his had an expression which always tempted me to hit him. Sir Michael, if what you say is true—and after all, Cairn, it only goes to show how little we know of the nervous system—literally took a viper to his bosom."

"He did. Antony Ferrara was his adopted son, of course; God knows to what evil brood he really belongs."

Both were silent for a while. Then:

"Gracious heavens!"

Cairn started to his feet so wildly as almost to upset the table.

"Look, Sime! look!" he cried.

Sime was not the only man in the bar to hear, and to heed his words. Sime, looking in the direction indicated by Cairn's extended finger, received a vague impression that a grotesque, long-headed figure had appeared momentarily in the doorway opening upon the room where the dancers were; then it was gone again, if it had ever been there, and he was supporting Cairn, who swayed dizzily, and had become ghastly pale. Sime imagined that the heated air had grown suddenly even more heated. Curious eyes were turned upon, his companion, who now sank back into his chair, muttering:

"The Mask, the Mask!"

"I think I saw the chap who seems to worry you so much," said Sime soothingly. "Wait here; I will tell the waiter to bring you a dose of brandy; and whatever you do, don't get excited."