He had sense enough, however, to perceive that his guests could not choose but avail themselves of so good an opportunity, and, after the first feeling of regret was over, made up his mind to the separation.

Next day Harold and Disco, with feelings of strong revulsion, almost of shame, fell into the ranks of the slave-gang, and for many days thereafter marched through the land in company with Marizano and his band of lawless villains.

Marizano usually walked some distance ahead of the main body with a few trusty comrades. Our adventurers, with their two followers, came next in order of march, the gang of slaves in single file followed, and the armed men brought up the rear. It was necessarily a very long line, and at a distance resembled some hideous reptile crawling slowly and tortuously through the fair fields and plains of Africa.

At first there were no stragglers, for the slaves were as yet, with few exceptions, strong and vigorous. These exceptions, and the lazy, were easily kept in the line by means of rope and chain, as well as the rod and lash.

Harold and Disco studiously avoided their leader during the march. Marizano fell in with their humour and left them to themselves. At nights they made their own fire and cooked their own supper, as far removed from the slave camp as was consistent with safety, for they could not bear to witness the sufferings of the slaves, or to look upon their captors. Even the food that they were constrained to eat appeared to have a tendency to choke them, and altogether their situation became so terrible that they several times almost formed the desperate resolution of leaving the party and trying to reach the coast by themselves as they best might, but the utter madness and hopelessness of such a project soon forced itself on their minds, and insured its being finally abandoned.

One morning Marizano threw off his usual reserve, and, approaching the white men, told them that in two hours they would reach the lake where his employer was encamped.

“And who is your master?” asked Harold.

“A black-faced or yellow-faced blackguard like himself, I doubt not,” growled Disco.

Antonio put Harold’s question without Disco’s comment, and Marizano replied that his master was an Arab trader, and added that he would push on in advance of the party and inform him of their approach.

Soon afterwards the lake was reached. A large dhow was in readiness, the gang was embarked and ferried across to a place where several rude buildings and barracoons, with a few tents, indicated that it was one of the inland headquarters of the trade in Black Ivory.