With the prisoner as a guide they had set off up-river in search of me, but had been much delayed by motor trouble, and had finally camped after dark a half mile above the spot where Victory and I had spent the night. They must have passed us in the dark, and why I did not hear the sound of the propeller I do not know, unless it passed me at a time when the lions were making an unusually earsplitting din upon the opposite side.英文原著 · 《The Lost Continent》