The soldier uttered an oath, stepped back a pace, and like a lion, leapt upon his assailant. There was a confused movement; the rifle dropped with a clatter upon the pavement; and the Scotchman seized about the middle in a grip such as he was unlikely ever to have experienced before, turned an amazingly unexpected somersault, landing, like a clown at the circus, in a sitting position in which he appeared to be staring open-mouthed at the beauties of a thousand dazzling stars.

Thereupon the ruffian quietly picked up the rifle, opened the gate, shut it behind him, and walked up the drive; while the Egyptian policeman ran to the soldier’s assistance, blowing the while upon his whistle with all the wind God had given him.

The dazed sentry scrambled to his feet, and, with a curious crouching gait, suggestive of the ring, followed the intruder into the drive.

“Gi’ me ma rifle,” he said, hoarsely. It was evident that he was trying to collect his wits; and his attitude was that of a wrestler looking for an opening.

The ruffian stood still, and in voluble Arabic ordered the policeman to stop his noise, at which the bewildered native, as though impressed by the peremptory words, obediently took the whistle out of his mouth and stood irresolute.

“Gi’ me ma rifle,” repeated the Scot, in injured tones, warily circling around his cool opponent.

Rupert Helsingham suddenly got up from his chair. “Why,” he exclaimed, “it’s Daniel Lane! Excuse me a moment.”

He hurried down the steps of the veranda; and, with breathless interest, Muriel watched the two men shake hands, the one a small dapper ballroom figure, the other a large, muscular brigand, a mighty man from the wilds. He wore a battered, broad-brimmed felt hat, an old jacket of thin tweed, and grey flannel trousers which sagged at the knees and were rolled up above a pair of heavy brown boots, covered with dust.

With an air of complete unconcern he gave the rifle back to the abashed sentry; and, putting his hand on Helsingham’s shoulder, strolled towards the veranda.

“I’ve ridden in at top speed,” he said, and Muriel noticed that his voice was deep and quiet, and that there was a trace of an American accent. “A hundred and fifty miles in under three days. Pretty good going, considering how bad the tracks are up there.” He jerked his thumb in the direction of the western desert.