The depth of this ice at one side is 60 feet, and how much more it may be in the middle it is impossible to say.

As we have seen, there is a second ice-cave opening out of the principal one, at a depth of 190 feet below the surface; and with respect to this second cave imagination may run riot.

Rosset told me that he had noticed, the year before, a strong source of water springing out of the side of a rock, at some little distance from the glaciere; but he could not reach it then, and could not find it now.

This may possibly be the drainage of the glaciere in its summer state.
The thermometer stood at 34 deg.

in the middle of the cave; and though the others felt the cold very much, I was myself surprised to find so low a register, for the atmosphere seemed to be comparatively warm, judging from what I had experienced in other glacieres.