“But he discovered far more than our explorers did, for while he was in the neighbourhood of Mount Terror an earthquake, accompanying a violent eruption of Mount Erebus, made a huge fissure in the south side of Mount Terror. After waiting three days to make sure that the earthquake had subsided, he and two of his officers entered the crevice, which they found to be over two hundred feet wide at the level of the land ice. “Furnished with storage batteries and electric lights, they penetrated into the interior of the mountain and found that it was pierced in all directions with great galleries and enormous chambers, hollowed out by volcanic forces during the period of Mount Terror’s activity. Four days were spent altogether in exploring this subterranean region, the existence of which was kept a profound secret by Kishenov and his officers. “Not the least strange and, as it has proved, one of the most valuable portions of his discovery was the finding of a subterranean lake in the heart of Mount Terror, the temperature of which was kept far above the freezing point by the heat which the interior of the mountain derived from the neighbouring fires of Mount Erebus. Finding the lake to be salt water, he concluded that it must have some connection with the open sea, and so the next day he and the same two officers entered the submarine boat and penetrated underneath the ice-barrier. “After a search of five hours, the search-lights of the boat revealed a huge tunnel leading south-west into the land, that is to say, direct for Mount Terror. They followed this tunnel up for a distance of nearly five miles, and then struck the end. They now rose, and finally found themselves floating on the surface of the lake in the interior of the mountain. “One of Kishenov’s officers, a man named Louis Khemski, was a member of the Russian Revolutionary Society, whose existence only became known five years ago. After the capture of the _Ithuriel_ the heads of this society met, and to them this man communicated the secret of Mount Terror. Kishenov and the other officer refused to join the revolutionists, and were assassinated. “Khemski was at once taken on board the _Ithuriel_, now renamed the _Revenge_, and guided her to the fissure leading into Mount Terror. Its outer portion was of course filled and covered with ice and snow, but as soon as Khemski had found its position by his landmarks, a couple of shells speedily reopened it, and it was here that the _Revenge_ lay hidden while you were ransacking the world for her.