You had better follow me.

I know every foot of the ground, and there are some nasty places, I can tell you." They had to make several detours, to avoid ravines running deep into the plateau, and for a time Captain Holland walked very cautiously.
When he had passed these, he stepped out briskly, and in less than an hour from starting they were near the edge of the precipice.

Their eyes had, by this time, become accustomed to the darkness.
"We are just there now," Captain Holland said.

"But we must go very cautiously, for the rock falls sheer away, without warning.

Ah! There is the edge, a few yards ahead of me.
"Now, do you stay where you are, while I feel about for that spear head I put in to mark the place.