“Stand easy!” commanded Brown. Then he marched off to the crossroads, finding his way in the blackness more by instinct and sense of direction than from any landmark, for even the road beneath his feet was barely visible. “D'you mean to tell me that neither of you men can hear that sound?” he asked the sentries. Both men listened intently, and presently one of them made out a very faint and distant noise, that did not seem to blend in with the other night-sounds. “Might be a native drum?” he hazarded. “No, 'tain't!” said the other. “I got it now. It's a horse galloping. Tired horse, by the sound of him, and coming this way. All right, Sergeant.” “One of you go two hundred yards along the road, and form an advance-post, so to speak. Challenge him the minute he's within ear-shot, and shoot him if he won't halt. If he halts, pass him along to Number Two. Number Two, pass him along to the guardroom, where I'll deal with him! Which of you's Number One? Number One, then--forward--quick--march!” The sentry trudged off in one direction, and Bill Brown in another. The sentry concealed itself behind a rock that flanked the road, and Brown spent the next few minutes in making the guard “port arms,” and carefully inspecting their weapons with the aid of a lantern. He had already inspected there once since supper, but he knew the effect that another inspection would be likely to produce. Nothing goes further toward making men careful and ready at the word than incessant and unexpected but quite quietly performed inspection of minutest details. He produced the effect of setting the men on the qui vive without alarming them. Suddenly, the farthest advanced sentry's challenge rang out. “Frie-e-e-e-nd!” came the answer, in nasal, high-pitched wail, but the galloping continued. “Halt, I tell you!” A breech-bolt clicked, and then another one. They were little sounds, but they were different, and the guard could hear them plainly. The galloping horse came on. “Cra-a-a-a-ack!” went the sentry's rifle, and the flash of it spurted for an instant across the road, like a sheet of lightning. And, just as lightning might, it showed an instantaneous vision of a tired gray horse, foam-flecked and furiously ridden, pounding down the road head-on. The vision was blotted by the night again before any one could see who rode the horse, or what his weapons were--if any--or form a theory as to why he rode. But the winging bullet did what the sentry's voice had failed to do. There came a clatter of spasmodic hoof-beats, an erratic shower of sparks, a curse in clean-lipped decent Urdu; a grunt, a struggle, more sparks again, and then a thud, followed by a devoutly worded prayer that Allah, the all-wise provider of just penalties, might blast the universe. “Stop talkin'!” said the sentry, and a black-bearded Rajput rolled free, and looked up to find a bayonet-point within three inches of his eye. “Poggul!” snarled the Mohammedan.