In the centre of the plain, apparently alone, a British soldier stood watching, a white-faced soldier, his khaki uniform creased and tumbled, and, though his rôle of sentry was no laborious one, already stained with dark patches of sweat. Around him for miles stretched the brown monotony of sun-baked stony flat, seamed here and there by ragged-edged nullahs and dry watercourses, in the sandy beds of which a few withered shrubs and tussocks of grass clung hard to a miserable existence.

Before him, some three miles away, a wall of mountains barred the view, a rampart of earth and stone glaring red in the sunlight; sheer from the plain it rose, a forbidding barrier between India and Afghanistan, a barrier too with but few gateways, one of which, however—a dark rift in the hills—lay directly in front of the soldier as he stood.

Here and there, huddled against the foot of the mountains, could be seen the mud walls and strong square towers of a Pathan village, apparently deserted save for the occasional appearance of a white-clad figure and a few herds of miserable-looking sheep and goats browsing on the hillside hard by. Far away behind him, the solid walls and ramparts of Fort Hussein rose from the plain, a former Sikh stronghold, and now the temporary abode of her Majesty's 1st Regiment of Lancers.

Screening its mass, arose a thick haze of dust and smoke, through which now and again could be seen the faint twinkle of lance-point and sword-scabbard, and, the dust at times clearing, strings of mules and horses moving to and from a pond of muddy water. Over all was a pitiless brazen sky, in which glared the yellow disc of the sun, its rays smiting down on sweating man and beast, and turning Fort Hussein into an inferno of flies, fever, and burning walls.

Sentry Bates, clutching his carbine, now well-nigh too hot to hold, viewed all these things with aching eyes, and spat on the ground and swore. "An' this is bein' on active service," he muttered, "this doin' of guards and pickets more than wot a man 'as in barriks, no fightin', no enemy, no nuthink, only patrollin,' an' stinkin' rations and 'ot beer when you git 'ome. Wot are we 'ere for, I'd like to know, wot for did they send the ridgmint up 'ere? Fed up, that's wot I am, fair fed up." He paused, took off his helmet and wiped his brow. He then replaced the headpiece, front to back, as is customary with Tommy Atkins when out of sight of authority, and, taking from his breast-pocket a packet of "Swell" cigarettes, lit one and resumed his soliloquy.

"Wonder what 'Ooky's doin' over there?" he murmured, gazing towards a hillock some two miles away to the front of him, where a small group of horses could be seen standing. "Fancy the bloke a-sendin' 'im on detached post, ruddy foolishness, I call it, not like the bloke at all. 'Ullo, they're movin', strike me, they're gone, now what the 'ell does that mean?" He remained staring vacantly.

Private Bates, though apparently solitary and unsupported, was nevertheless not so, for close at hand, hidden from view in the depths of a great nullah, a troop of the 1st Lancers were lying; to which force he was now acting as look-out man.

Here, standing in a row, their heads fastened together by the process known in the Service as "linking," were the horses, black with sweat and restlessly kicking at the buzzing flies, while their riders, except the luckless Bates and a few men told off to watch the animals, were sitting in a circle smoking and indulging in that desultory conversation to which the British soldier is addicted. Some yards away Hector Graeme was lying on his back, his head resting on his helmet and a handkerchief spread over his face. For an hour he had so lain, trying to sleep; but, the flies and heat forbidding, he had now abandoned the attempt, and was listening to the conversation of the men.

The detachment of which he was this morning in command, or rather one similar to it—for the duty devolved on each troop of the regiment in turn—was sent out daily from Fort Hussein to its present position, its mission being to watch for and report on any movement of tribesmen from the direction of the Pass. For the better fulfilment of the task allotted, and to avoid unnecessary wear and tear of horseflesh, it was customary to push forward from the troop itself a detached post of six men under a non-commissioned officer. These were stationed on a small hillock about a mile distant from the mouth of the Pass, their orders being to watch it, but on no account to enter it.

To-day the command of this post had been entrusted to a certain Sergeant Walker, familiarly known as "Hooky," for, as every soldier is aware, in the Army all Walkers are "Hookies," just as all Clarkes are "Nobbies."