There was some water in a little natural basin at the base of the cliffs.

I determined therefore to halt here for breakfast and, leaving the men at the foot of the cascade to prepare some tea, I clambered to its summit, and found myself on another tableland similar to that which I had just left, and covered in the same manner with natural columns.
SANDSTONE CAVERNS.
Some distance from the top of the cascade I discovered a cavern, or rather huge hole in the water-course, into which, thinking it might contain fossil bones, I descended as far as the first ledge, and I then perceived that the water pouring through this cavern in the rainy season was cutting off another rock of sandstone similar to the remarkable pillar in front of the cascade.

The water in the basin below must have filtered out from this cavern.

On a further examination I found that a precisely similar series of operations was going on throughout the whole amphitheatre of cliffs which bounded the tableland we had been traversing during the morning.
In the rainy season (March 7th) I again passed this spot and found the watercourse full of water, which was also falling abundantly from the cascade.

From this circumstance I inferred that the subterraneous outlets for the water were all filled, consequently the large body which these caverns would contain must have been then endeavouring to force its way through the fissures in the porous sandstone rocks.
CONTINUATION OF ROUTE.