The entrance to the glacière was in a wall of rock, set at an angle of some thirty-five degrees; at the bottom of this there was some grass. An easy chimney some fifteen meters high led up to the glacière. Up this chimney we climbed. At the top we entered a little cave about two meters deep, by a sort of portal about two meters wide. The cave made an elbow to the right, and passing this we found that it turned to the left and pointed directly into the mountain. The rock went down vertically in front of us, but the boy said we could get down, so having first lowered a candle by a string to see the depth, which turned out to be a perpendicular drop of some four or five meters, with the help of the rope we all climbed down. We were already almost entirely away from the daylight and a few steps took us into complete darkness, except for the light we had from the candle each of us held in his hand. The fissure led straight into the mountain. It was a couple of meters wide at places, and there we moved along the bottom. In one place it narrowed below to a wedge, and there we progressed either by climbing along one side or by placing one foot on one side and the other foot on the other. The fissure led downwards as well as inwards. It would have been nothing in daylight to go through it; but in the semi-darkness it was not easy. After a descent of some twenty-five meters or thereabouts, we arrived at the glacière, and I have certainly never seen a weirder place. There was a great arched rock dome, perhaps six meters in height, and some twelve in diameter; the floor was a sheet of smooth, slippery ice, at one end curling over, gently at first, afterwards more steeply, to a lower depth; and on the sides were seven or eight ice columns streaming from cracks in the rocks to the floor. Each of these columns was some three or four meters high, and, small at the top and in the middle, spread out at the base into the shape of fans. In the dim candle light and the cold damp atmosphere, the columns loomed up like so many ghosts, and the landscape impression was strange and solemn. The air here seemed perfectly still. There was another curiosity. The fissure we had come down, at this point some three meters wide, was filled, just beyond the glacière, with pure, transparent water, which formed a little lake: this was perhaps one meter deep, and extended across the fissure, barring further progress. It certainly seems strange that in the same cavern, under nearly the same conditions of temperature, there should be one place covered with a flooring of ice and another filled with water. The explanation, however, is perhaps not far to seek. Over the lake there was a distinct draught of air. The draught probably melts the ice in summer, if indeed it does not prevent any from forming in winter. There are, so far, no winter observations reported of this cave, yet it would seem to be one which would well repay the trouble. THE GLACIÈRE DE CHAUX-LES-PASSAVANT.