Mr. Sheldon was a man of industrious habits,—fond indeed of work, and distinguished by a persistent activity in the carrying out of any labour he had planned for himself. He was not prone to the indulgence of idle reveries or agreeable day-dreams. Thought with him was labour; it was the "thinking out" of future work to be done, and it was an operation as precise and mathematical as the actual labour that resulted therefrom. The contents of his brain were as well kept as a careful trader's ledger. He had his thoughts docketed and indexed, and rarely wasted the smallest portion of his time in searching for an idea. Tonight he sat thinking until he was interrupted by a loud double knock, which was evidently familiar to him, for he muttered "George!" pushed aside his desk, and took up his stand upon the hearthrug, ready to receive the expected visitor.

There was the sound of a man's voice below,—very like Philip Sheldon's own voice; then a quick firm tread on the stairs; and then the door was opened, and a man, who himself was very like Philip Sheldon, came into the room. This was the dentist's brother George, two years his junior. The likeness between the two men was in no way marvellous, but it was nevertheless very obvious. You could scarcely have mistaken one man for the other, but you could hardly have failed to perceive that the two men were brothers. They resembled each other more closely in form than in face. They were of the same height—both tall and strongly built. Both had black eyes with a hard brightness in them, black whiskers, black hair, sinewy hands with prominent knuckles, square finger-tops, and bony wrists. Each man seemed the personification of savage health and vigour, smoothed and shapened in accordance with the prejudices of civilised life. Looking at these two men for the first time, you might approve or disapprove their appearance; they might impress you favourably or unfavourably; but you could scarcely fail to be reminded vaguely of strong, bright-eyed, savage creatures, beautiful and graceful after their kind, but dangerous and fatal to man.

The brothers greeted each other with a friendly nod. They were a great deal too practical to indulge in any sentimental display of fraternal affection. They liked each other very well, and were useful to each other, and took their pleasure together on those rare occasions when they were weak enough to waste time upon unprofitable pleasure; but neither of them would have comprehended the possibility of anything beyond this.

"Well, old fellow," said George, "I'm glad you're back again. You're looking rather seedy, though. I suppose you knocked about a good deal down there?"

"I had a night or two of it with Halliday and the old set. He's going it rather fast."