At the same moment, out of a clump of elephant-grass some three hundred yards up the river, came a long vermilion canoe manned by eight negroes. In the stern sat a European in a green coat. Catching sight of the two figures by the riverside he sprang up, appeared to hesitate, then gave a sudden order. The canoe swung round, and barely a minute after it had emerged from the rushes it disappeared again, rapidly moving under the strokes of eight red paddles.
Not, however, before Mbutu's sharp eyes had flashed a glance at it. He uttered a low cry, and turned to Tom.
"Dago man, sah!"
"Where?" said Tom, wheeling landwards with a start.
"Ober dar, sah. Long canoe, dago man in green coat. Sah knock him down."
"Nonsense! You can't see clearly all that way. It must have been someone else."
"Dago, sure nuff," returned the boy positively. "Mbutu know eyes, nose, coat, kiboko, all berrah much."
"Ho, ho! So the dago is here, is he? Now I wonder what he is after. He couldn't have known we were coming, that's certain. He must have started before us--perhaps on the track of the expedition. Well, Mbutu, we must find out what his game is. Did he see you, d'you think?"
"See Mbutu? Yes. Sah too. Dago see all much. Sah knock him down!"
"Well, I hope I shall not have to knock him down again. We must keep our eyes open, Mbutu; remember, my uncle's life in all probability depends on our running no risks."