But the lieutenant had some reason for his burden of care. The object of the expedition upon which he was setting forth was the arrest of some native cattle-stealers at a Bakalahari kraal, far out to the westward, in the more desert portion of British Bechuanaland. There had been a sudden call for troopers of the Bechuanaland Border Police up in the northern protectorate, and it happened that the only man Parton could take with him as orderly upon this particular morning was the very last person in the world with whom he would have chosen to spend several days—probably a week or more—in the closest intercourse. Trooper Gressex, now waiting outside in front of the hotel, was that man.

Although the one was a lieutenant close upon his captaincy, the other plain trooper in the frontier force, the two men had once been social equals at home, and, at school and elsewhere, upon terms of considerable intimacy. Gressex (formerly known as Tom Mainwaring) had migrated from London society and a career of sport and pleasure, after coming somewhat suddenly to the end of his financial tether. He had made his plunge into obscurity and had re-appeared as an unknown trooper in the Bechuanaland Border Police.

Parton had quitted service in a line regiment in India, where he saw little prospect of promotion, and had accepted a commission in the same Border Police force. The two men had first encountered one another, in their now altered circumstances, some three months back. Upon the South African frontier such striking changes of condition are being constantly met with, and are borne by the less fortunate, almost invariably, with a good-humoured, if somewhat reckless, philosophy.

In this instance Partons discovery of his old schoolfellow’s altered lot had not been altogether a welcome one; and on this particular December morning he had, as has been hinted, a special reason for desiring any other trooper as his orderly upon the expedition in front of him.

The lieutenant entered the coffee-room of the squat, corrugated-iron hotel, and ate his breakfast. In ten minutes he appeared upon the street, ready for his horse. Trooper Gressex, who was leaning against the stoep, holding his own horse and Parton’s, saluted as his officer came forth, and answered the formal “Good morning, Gressex,” with an equally formal “Good morning, sir.”

The two men mounted and rode away, no slightest sign having fallen to denote that they had ever occupied any other relations than those of officer and man.

Having ridden quietly half-a-mile out of the town, Parton lighted his pipe and set his horse into a canter. Gressex rode upon his flank, and the two steadily reeled off mile after mile of the vast sweep of grassy, undulating plains over which their route lay. Hour after hour they rode through the blazing day, off-saddling every three hours and giving their nags a brief rest according to invariable South African custom. At night, having compassed more than fifty miles, they finally halted, and prepared to camp just within the shelter of a patch of woodland, which here broke the monotony of the grass veldt. The horses, after a longish graze, were tied up to a handy bush; the two men, having eaten a supper of tinned “bully beef” and brewed a kettle of coffee, lay upon their blankets and smoked by the pleasant firelight. The few scraps of conversation which they exchanged related solely to the expedition before them, Gressex having more than once made the journey to Masura’s kraal.

Aloft the infinite calm of the far-off, dark-blue heaven, now spangled with a million stars, seemed to invite deep and peaceful sleep after a hard day’s riding. A refreshing coolness now moved upon the veldt, the tender airs whispered softly through the long grasses, a cicada droned drowsily in the thorn-bush; all nature promised rest. At nine o’clock both men, lightly wrapped in their blankets, with their feet to the fire and their heads pillowed in their saddles, were fast asleep.

At one o’clock in the still, early morning Gressex was awakened by the sound of a voice. He rose softly upon his elbow and looked about him. The stars shone more gloriously than ever, but the Southern Cross had fallen from its erect position and now lay over upon its side. The veldt was perfectly quiet, save for the plaintive wailing of a far-off jackal, which had got their wind and was crying out the news to his fellows. Even the cicada had ceased its weary drumming. As Gressex lay upon his elbow listening, he perceived that the sounds he had heard came from Parton, who was talking fitfully in his sleep. It is hard to follow a man whose tongue labours with the difficulties of a slumbering brain, and Gressex was not much interested in puzzling out the intricacies of his officer’s drowsy speech, but one word fell upon his ear which instantly fixed his attention. The word was “Ella.”

“Ella,” muttered the sleeping man, in a curiously sententious way, “I tell you I can’t do it. It’s not the least use thinking further about him. You’ll never see him again; why harp upon a broken string? Some day I hope you’ll be kind and give...”