At length all but a score, who had apparently been left to prevent our escape, had left us, and our adventure seemed destined to result in a siege, the only outcome of which could be our death by starvation; for even should we be able to slip out after dark, whither in this unknown and hostile valley could we hope to turn our steps toward possible escape?
As the attacks of our enemies ceased and our eyes became accustomed to the semi-darkness of the interior of our strange retreat, I took the opportunity to explore our shelter.
The tree was hollow to an extent of about fifty feet in diameter and from its flat, hard floor I judged that it had often been used to domicile others before our occupancy. As I raised my eyes toward its roof to note the height I saw far above me a faint glow of light.
There was an opening above. If we could but reach it we might still hope to make the shelter of the cliff caves. My eyes had now become quite used to the subdued light of the interior, and as I pursued my investigation I presently came upon a rough ladder at the far side of the cave.
Quickly I mounted it, only to find that it connected at the top with the lower of a series of horizontal wooden bars that spanned the now narrow and shaft-like interior of the tree's stem. These bars were set one above another about three feet
