For two days the united expeditions kept on their way up the mountain side, which sloped gradually at its base, the steeper portion still being several days' journey distant.
During these days they shot several wild animals including a beautiful antelope, while Sam caught a monkey. But the monkey bit the boy in the shoulder, and Sam was glad enough to get rid of the mischievous creature.
On the afternoon of the second day Cujo, who was slightly in advance of the others, called a halt.
"Two men ahead ob us, up um mountain," he said. "Cujo Vink one of dern King Susko."
"I hope it is!" cried Dick quickly.
The discovery was talked over for a few minutes, and it was decided that Cujo should go ahead, accompanied by Randolph Rover and Dick. The others were to remain on guard for anything which might turn up.
Dick felt his heart beat rapidly as he advanced with his uncle and the African guide through the tangle of thorns and over the rough rocks. He felt that by getting closer to King Susko, he was also getting closer to the mystery which surrounded his father's disappearance.
"Dar him am!" whispered Cujo, presently. "See, da is gwine up into a big hole in de side ob de mountain?"
"Can you make out if it is Susko or not?"
"Not fo' certain, Massah Dick. But him belong to de Burnwo tribe, an' de udder man too."