Concerning the perils of the rapids he decided to take his chances. It was just possible that the Birwas had lied, hoping to deter him from his purpose. That they were fairly experienced in the art of canoeing was evident by the way in which they skilfully avoided the numerous hippopotami, their broad-bladed paddles entering the water without the faintest suspicion of a splash.

Whenever, as frequently happened, the canoe passed a native village von Gobendorff, no doubt with the loss of a certain amount of prestige, took up a position at full length at the bottom of the canoe, strictly warning his boatmen that they were to maintain absolute silence as far as his presence was concerned.

The canoe had barely passed a small collection of huts when the two Birwas began to jabber vociferously, pointing at an object a hundred yards ahead.

"Why this noise?" demanded von Gobendorff, who understood the cause of the conversation. "You have passed dozens of 'river-cows' before?"

"This one is awake and furious," replied one of the natives. "We sought to keep to the bank, and the animal has seen us."

The Hun sat up and drew his pistol. A brief glance on either hand showed that there were no signs of escape by running the canoe ashore. The banks were here quite twenty feet in height, precipitous and topped with dense vegetation. There was deep water close to land, while in mid-stream a mud-bank just showed above the swirling current.

"Go on!" he ordered.

The men plied their paddles vigorously. Although the heavily-constructed canoe was incapable of any great speed, and was also undermanned, the commotion of the paddles and the frantic shouts of the two blacks made up for the lack of manoeuvring powers. The hippo dived. The canoe shot past.

Von Gobendorff breathed freely, but he was too premature. The hippopotamus reappeared amidst a smother of foam. Its wide-open jaws closed up on the gunwale of the dug-out.

The canoe listed dangerously. The Birwas still further endangered its stability by standing upright and raining absolutely ineffectual blows with their paddles upon the armour-plated head of the amphibian. The air in the vicinity of the heeling craft was thick with spray and flying fragments of woodwork.