quarter of a mile deep—and then suddenly the quick eyes of Lord John fell upon what we were seeking. High up above our heads, amid the dark shadows, there was one circle of deeper gloom. Surely it could only be the opening of a cave.
The base of the cliff was heaped with loose stones at the spot, and it was not difficult to clamber up. When we reached it, all doubt was removed. Not only was it an opening into the rock, but on the side of it there was marked once again the sign of the arrow. Here was the point, and this the means by which Maple White and his ill-fated comrade had made their ascent.
We were too excited to return to the camp, but must make our first exploration at once. Lord John had an electric torch in his knapsack, and this had to serve us as light. He advanced, throwing his little clear circlet of yellow radiance before him, while in single file we followed at his