Captain Forbes scoffs at these bones, and suggests errant wild ponies as the depositors thereof.
Olafsen had found in his earlier visit that the way was stopped, far in the recesses of the cave, by a lake of water, which filled the tunnel to a depth of 3 feet or more, lying on ice; but in 1753 there was not more than a foot of water, through which they waded without much difficulty.

The air soon became exceedingly cold and thick, and for some hundreds of paces they saw no light of day, till at length they reached a welcome opening in the roof.

Beyond this, the air grew colder and more thick, and the walls were found to be sheeted with ice from roof to floor, or covered with broad and connected icicles.

The ground also was a mass of ice, but an inch or two of fine brown earth lay upon it, which enabled them to keep their footing.

This earth appeared to have been brought down by the water which filtered through the roof.