Beyond, lying in the full sun glare, were sixty or seventy wretched, woolly-haired negroes, men and women, chained together and guarded by a dozen of the veiled men. Throughout Northern and Central Africa the very name of the Songhoi was synonymous with all that was fierce, cruel, and relentless, for they lived by robbing the desert caravans or capturing slaves in the boundless virgin forests between the Niger and the Congo, being essentially a nomadic race, and having no other home than their tents in the Sahara, that limitless wilderness of rock and sand. Of all the slavers of Central Africa these “veiled men” were the worst, for they attacked and burned villages, placed the unfortunate blacks to torture to compel them to reveal the hiding-places of their store of ivory, and afterwards took them prisoners, and sold them in the great central slave-market at El Obeïd, away in Kordofan.

Among the natives of the Upper Congo and the Aruwimi, even the hordes of that notorious king of slavers, Tippu-Tib,—so called by the negroes because the guns of his men created a noise, from which they have named him phonetically,—were more tolerated than the fierce Songhoi bands, with their black veils, which none ever removed, sleeping or waking; for the track of the latter through the forest or grass-land was always marked by murder, devastation, and wanton cruelty.

Dubois, when in the service of King Leopold, had been active in endeavouring to put down the trade, but seeing how lucrative it was, and finding Snape, an English adventurer, ready to join him, he had collected a following of the fiercest Touaregs he could gather, and as he paid all well for their services, while on their part they were proud to be led by a white man in whom they had once lived in fear, their trade had, for a long time, been a most lucrative one. They were the terror of the whole region from Stanley Falls to Tanganyika. A dozen times they had been north to El Obeïd with ivory of both varieties, white and black, and on each occasion the profits had been far beyond their expectations. The trade is still easy enough in the Congo State, and slaves are captured without very much difficulty. The great risk, however, is to transport them by the route they had been following for the past two months, as, in order to reach the central market, they had to pass through that portion of British territory where a very watchful eye is kept, and where the notorious Arab raider Kilonga-Longa met his fate only a few months before.

But Dubois and Snape had run the gauntlet many times, and were absolutely fearless. On the present raid through the country of Emin and Junker, they had made their captures in the Moubouttou, within the Belgian sphere of influence, with the complicity of the Belgian agent at Sanga, whom they, of course, bribed with a goodly present of ivory; then, marching through the great Forest of Eternal Night, due northward to Zayadin, they had passed through the Dinka country to Fatik, which, being only two days’ march from the Bahr-el-Guebel upon which the British have posts, is a dangerous point. Nevertheless, they had pushed forward night and day, and were now in the centre of that great, sunburnt desert, the Wilderness of Nouer, which stretches northward for three hundred miles to El Obeïd.

Dubois grumbled loudly at the Englishman for interrupting his meditations, saying—

“Go and sleep, mon cher. You’ll be getting fever if you worry too much.”

“Worry!” echoed Snape. “There’s danger, I tell you. Surely you’re not a confounded fool, man?”

“Ah,” answered his partner, quite calmly, “is there not always danger here, in Africa? You have a wonderful imagination, my dear Henri, I quite admit; but do allow me to finish my sleep. Then let us talk of this extraordinary hole, whatever it may be.”

“Idiot!” ejaculated the Englishman, hitching up his flowing white burnouse. He was a tall, good-looking fellow of forty, whose career, however, had been a singularly eventful one. Since he left Balliol he had met with a good many adventures in various lands, most of them being to his discredit. He had been a born gambler, and had drifted from the London clubs to the tables at Monte Carlo, and thence, by a very crooked channel, to that sink of the world, Africa, where chance had brought him in contact with the scoundrel and arch-slaver Dubois. They were a well-matched pair. At college Snape had taken honours for Arabic, therefore his knowledge of that language now served him in good stead. He was one of those men who could never run straight, even though he had often tried. He was a born outsider.

“Why idiot?” inquired his partner lazily. The old negress waved the fan backwards and forwards, understanding not a word of the conversation between the headman and the great white Sheikh, who, on account of his raiding, the Touaregs had named The Father of the Hundred Slaves.