Ninnis, who was walking along by the side of his sledge, close behind my own, heard the warning, for in my backward glance I noticed that he immediately swung the leading dogs so as to cross the crevasse squarely instead of diagonally as I had done. I then went on with my work. There was no sound from behind except a faint, plaintive whine from one of the dogs which I imagined was in reply to a touch from Ninnis's whip. I remember addressing myself to George, the laziest dog in my own team, saying, "You will be getting a little of that, too, George, if you are not careful." When I next looked back, it was in response to the anxious gaze of Mertz who had turned round and halted in his tracks. Behind me, nothing met the eye but my own sledge tracks running back in the distance. Where were Ninnis and his sledge? I hastened back along the trail thinking that a rise in the ground obscured the view. There was no such good fortune, however, for I came to a gaping hole in the surface about eleven feet wide. The lid of a crevasse had broken in; two sledge tracks led up to it on the far side but only one continued on the other side. Frantically waving to Mertz to bring up my sledge, upon which there was some alpine rope, I leaned over and shouted into the dark depths below. No sound came back but the moaning of a dog, caught on a shelf just visible one hundred and fifty feet below. The poor creature appeared to have broken its back, for it was attempting to sit up with the front part of its body while the hinder portion lay limp. Another dog lay motionless by its side. Close by was what appeared in the gloom to be the remains of the tent and a canvas tank containing food for three men for a fortnight. We broke back the edge of the neve lid and took turns leaning over secured by a rope, calling into the darkness in the hope that our companion might be still alive. For three hours we called unceasingly but no answering sound came back. The dog had ceased to moan and lay without a movement. A chill draught was blowing out of the abyss. We felt that there was little hope. Why had the first sledge escaped the crevasse? It seemed that I had been fortunate, because my sledge had crossed diagonally, with a greater chance of breaking the snow-lid. The sledges were within thirty pounds of the same weight. The explanation appeared to be that Ninnis had walked by the side of his sledge, whereas I had crossed it sitting on the sledge. The whole weight of a man's body bearing on his foot is a formidable load and no doubt was sufficient to smash the arch of the roof. By means of a fishing line we ascertained that it was one hundred and fifty feet sheer to the ledge on which the remains were seen; on either side the crevasse descended into blackness. It seemed so very far down there and the dogs looked so small that we got out the field glasses, but could make out nothing more by their aid.