As Royce had expected, the shouts of the men had the effect of bringing up the nearest man of the escort at the double, leaving the group of prisoners, of which he was in charge, to follow. The moment he showed himself round the corner Royce dealt him a blow that stretched him on the ground. Gambaru, acting on Royce's instructions, instantly pounced on the man, tore the turban from his head, and calling to John to assist him, stuffed into his mouth a gag made of the linen, and pinioned his arms with strips shred from his loincloth.

Royce, meanwhile, stood waiting for the next man, at the same time watching with some anxiety the operations of his Hausas. All, perhaps, depended on their quickness. His anxiety was needless. With ready wit John perceived the nature of his master's design, and within twenty seconds the fallen Tubu was helpless and harmless.

COLLAPSE

A few moments later a second Tubu dashed round the bend. Like the first, he had left his gang of prisoners, and run ahead to discover the cause of the outcry, which had now ceased, for the men of the advance guard had been carried far down the rapid stream.

The second man was served as the first had been. A third and a fourth appeared, only to meet the same fate. Then there was a pause. Either the remaining members of the escort had not heard their comrades' yells, or the ensuing silence had reassured them.

Three-parts of the column of captives had meanwhile been left unguarded. But the wretched creatures marched slowly on. Roped together, men and women, with their captors before and behind, they did not dream of attempting to escape. They were too weary and listless to feel any curiosity about the brief noise ahead of them. There was nothing to flash a gleam of hope into their dejected minds.

The first gang of them, a full score in number, dragged their tired feet round the bend. Their heads were downcast, but a sudden exclamation from John caused some of them to look up in startled surprise. Among them were Kulana and three others of Royce's carriers.

John instantly slit the rope that fastened the first couple by the neck, and, passing along the line, set the prisoners free one after another. Dejection gave way to joy, silence to shouts and laughter.