The Ostjaks greatly admired the craft, which was entirely different from anything they had ever seen. The false keel puzzled them greatly, and Godfrey's explanations, even when aided by Luka, failed altogether in making them understand that it would have the effect of enabling the craft to sail near the wind without drifting to leeward. The additional draught of water was no inconvenience whatever in a craft designed for the sea, and it added materially to the strength of the canoe. On the 15th of May it was freezing hard. The natives going down to the water's edge in the morning reported a sudden rise of three feet in the river. It continued to rise all day, and by nightfall was fifteen feet above its former level. In the evening the north wind dropped suddenly, and an hour later it sprang up from the south, and by midnight a torrent of rain was falling. Godfrey could hear sounds like the reports of cannon above the pattering of the rain on the skins, and knew that it must be the ice breaking. In the morning when he looked out the whole mass of ice seemed to be moving. Black cracks showed everywhere across the white surface. The river had during the night risen another twenty feet. By mid-day the scene was a wild one indeed. No longer was the surface smooth. Hurrying along at the rate of fifteen miles an hour the great masses of ice were dashed against each other by the force of the current. Two miles lower down the river narrowed suddenly, and here a block was formed. Some of the pieces of ice were thrust down, others climbed over them, thrusting themselves one on the top of the other till a ridge thirty or forty feet high was formed from bank to bank. At times this gave way, and then the whole was whirled down the stream, while another ridge at once commenced to form. Godfrey walked down to the point and stood for hours looking at the scene. The great blocks of ice, six or eight feet thick, seemed almost to be endowed with vitality as they climbed one above the other, until thrust off the crest of the ridge by the pressure of those behind them. The din was prodigious, a crackling, rustling, roaring sound, with sharp explosions and deep muffled booming. The whole air seemed to quiver with sound, and the loudest shout would have been inaudible a yard or two away. Below the ridge the river, so long as the barrier stood, was comparatively clear, but from time to time great masses of ice that had been sunk by the pressure and swept along under the ridge came to the surface with a surge that lifted one end high out of the water, reminding Godfrey of the spring of some enormous fish; then the ice would come down with a mighty splash, and hasten away reeling and rocking on the rapid current. Entranced by this mighty conflict of the forces of nature, Godfrey stood there until seven or eight o'clock in the evening.