CHAPTER XI. AT THE SUMMIT OF THE CONE—THE INTERIOR OF THE CRATER—SEA EVERYWHERE —NO LAND IN SIGHT—A BIRD’S EVE VIEW OF THE COAST—HYDROGRAPHY AND OROGRAPHY —IS THE ISLAND INHABITED?—A GEOGRAPHICAL BAPTISM—LINCOLN ISLAND. A half hour later they walked back to the camp. The engineer contented himself with saying to his comrades that the country was an island, and that to-morrow they would consider what to do. Then each disposed himself to sleep, and in this basalt cave, 2,500 feet above sea-level, they passed a quiet night in profound repose. The next day, March 30, after a hurried breakfast on roast trajopan, they started out for the summit of the volcano. All desired to see the isle on which perhaps they were to spend their lives, and to ascertain how far it lay from other land, and how n