“Working like clock work,” he thought.

To scale the tree was an easy matter. And putting down his two cases, Jack in a trice was in the lower branches. Then Mfum-ba handed up the case containing the radio receiving set and aerial, as Jack indicated. Mounting into the tree, which closed about him, concealing him completely, Jack carried the insulated wire of the aerial to the top. Pausing only in conclusion for a hasty glance through the branches toward the square, a glance which told him nothing. Descending, he placed the receiving cabinet in a crotch which had caught his eye as he passed, and where it rested as securely as if in a place especially made for it.

Working at top speed, Jack yet was careful that everything should be put in proper order. And when he had finished, he dropped lightly to the ground. The alley between the huts and the wattled wall was still deserted. And from the sounds reaching him from the direction of the square, Jack surmised his father and the latter’s companions were successfully keeping the populace engaged.

Between him and Mfum-ba not a word had so far passed, for neither could have understood the other’s tongue. But gestures were more eloquent than words. Mfum-ba parting the grass thatch at the rear of The Prophet’s hut, as he had parted that of the guest house, stepped within, one skinny, claw-like black hand left behind and beckoning Jack on. Jack set his teeth, for the most dangerous part of his task yet remained. Then he, too, entered the hut by this novel method, pushing ahead of him the case containing the loudspeaker.

The hut was empty save for Mfum-ba and himself. But curious though he was to discover something regarding the identity of this mysterious individual who inhabited it, Jack after a hasty glance around which took in the floor pallet, a writing case upon which lay a sheet of paper filled with fine writing in German script (that much he did note), and a small box in one corner, proceeded to his task.

That was to fasten the loudspeaker in the roof of the hut, so that the trumpet was on the outside but concealed by a light covering of straw. When it had been arranged to his satisfaction, and he felt certain it would stay in position and would not be discovered except by direct search, Jack poked the coil of wire with which to connect it to the receiving set out of the roof so that it rolled down and dropped into the alley at the rear.

Then, listening a moment to assure himself that the crowd in the square outside was still engaged, he indicated by signs to Mfum-ba, who stood near the doorway, alternately peering into the square and up at him, that his task was finished. And parting the thatch of the rear wall, he stepped out with Mfum-ba at his heels.

Then came the first upset in his schedule, which so far had gone along precisely as planned. For as Jack stepped through the thatch, he saw a tall Negro passing through the alley at the rear pause not a yard away from him and stare open-mouthed as if at an apparition. If the fellow gave the alarm, all would be lost. As this reflection flashed through his brain, Jack became desperate. Was all his effort to go for nought, because a chance passer-by discovered him at that crucial moment? Not if he could avoid it.

With panther-like swiftness Jack leaped toward the Negro, and his right fist shot out and caught him beneath the ear with stunning force. The black toppled over without a sound, and Jack caught him in his arms as he fell. Mfum-ba stood behind him, wringing his hands, at this unexpected catastrophe. But the next second the old wizard’s face became wreathed in fury, and whipping a knife from his cotton robe he would have plunged it into the heart of the poor fellow had Jack not dropped his unconscious burden and seized the wizard’s upraised arm with a powerful grip.

Jack was almost frantic. Here he had an unconscious man on his hands, who, as soon as he returned to his senses, would give the alarm. And he had to deal with Mfum-ba or the latter would knife the Negro without compunction. To make matters worse, his task was not yet completed. The loudspeaker had still to be connected with the receiving set.