A short way farther down, an opening appeared to the left; and I turned off the main passage into a horizontal gallery or chamber, with a floor of ice resting on rock and stones.

This chamber seemed to be 3 or 4 yards wide at the entrance, narrowing regularly to 4 1/2 feet.

It was 40 feet long, and at the farther end, which would not have been visible from the entrance, on account of a slight bend in the ice-gallery, even if there had been any light, it was closed by an ice-cascade 7 yards high and 4 1/2 feet broad at the bottom.

The ice of much of this cascade was so clear, that I saw the rock upon which it rested, or in some parts did not rest, quite plainly, and the large air-cavities in the structure were beautifully shown by the richly-coloured rock behind.

None of the current which we had observed above, and which had nearly baffled my protecting care of the candle during the descent, came from this gallery; but I find it written in my notes that the gallery was _very_ cold.