While engaged in their discussion as to the depth of the river, the latter had been observed standing upon the bank and throwing large pebbles into the stream. Thinking it was merely some freak or superstition on the part of the savage, none of them had taken any notice of him, Swartboy excepted. The Bushman was watching the Kaffir, with glances that bespoke a keen interest in his movements.
At length a loud scornful laugh, from Swartboy, accompanying a series of rather rough phrases, directed the attention of the young yägers upon the Kaffir.
“My footy, Congo! ole fool you! b’lieve you tell depth so? tink so, ole skellum? Ha! ha! ha! you bania groot ole humbug! Ha! ha! ha!”
The Kaffir took no notice of this rather insulting apostrophe, but continued to fling his pebbles as before; but the young yägers, who were also watching him, noticed that he was not throwing them carelessly, but in a peculiar manner, and their attention now became fixed upon him.
They saw that each time as the pebble parted from his fingers, he bent suddenly forward, with his ear close to the surface, and in this attitude appeared to listen to the “plunge” of the stone! When the sound died away, he would rise erect again, fling another pebble farther out than the last, and then crouch and listen as before?
“What’s the Kaffir about?” asked Hendrik of Groot Willem and Arend, who, being his masters, were more likely to know.
Neither could tell. Some Zooloo trick, no doubt; Congo knew many a one. But what he meant by his present demonstration neither could tell. Swartboy’s conjecture appeared to be correct, the Kaffir was sounding the depth of the drift.
“Hilloa, there! Congo!” cried Groot Willem. “What are ye after, old boy?”
“Congo find how deep drift be, baas Willem,” was the reply.
“Oh! you can’t tell that way; can you?”