“Not badly got up for barbarians,” mused friend Joe, speaking his thoughts aloud.

“Oh, they employ these pigeons frequently, to set fire to the thatch of hostile villages; but this time the village mounted higher than they could go.”

“Why, positively, a balloon need fear no enemies!”

“Yes, indeed, it may!” objected Ferguson.

“What are they, then, doctor?”

“They are the careless people in the car! So, my friends, let us have vigilance in all places and at all times.”

CHAPTER THIRTY-FIRST.

Departure in the Night-time.—All Three.—Kennedy’s Instincts.—Precautions.—The Course of the Shari River.—Lake Tchad.—The Water of the Lake.—The Hippopotamus.—One Bullet thrown away.

About three o’clock in the morning, Joe, who was then on watch, at length saw the city move away from beneath his feet. The Victoria was once again in motion, and both the doctor and Kennedy awoke.

The former consulted his compass, and saw, with satisfaction, that the wind was carrying them toward the north-northeast.