ut fifty feet. Two men were working inside the holder, one a foreman, and the other a labourer named Case, the latter in a diver's helmet. They were standing on a plank floating on the water. Fresh air was being pumped down to Case, who, so long as he kept on the helmet, was perfectly safe.
All at once the foreman found he was beginning to feel faint, so he told the labourer they would go up to the top for fresh air. But he had not the strength to carry out his purpose. The raft was pulled to the ladder by which they were to get out; but he was unable to ascend, and fell down in a fainting condition.
Then the labourer, regardless of the danger he was running, unscrewed his helmet, into which fresh air was being pumped, and, placing it quite near his fallen comrade, enabled him to get some of the air. The foreman tried in vain to get Case to put on the helmet; and his own strength was too slight to force him to do so. Indeed, he was in such a state of weakness that he fell on the raft, and knew n