“Hold on!” roared Baldwin, laying hold of the life-line. “Why, man alive, you’re off without the front-glass!”

“Och! Whirra! So I am,” said Rooney, pausing.

“Pump away, lads,” cried Baldwin, looking back at his assistants.

“Whist! What’s that?” asked the pupil excitedly, as a hissing sound buzzed round his head.

“Why, that’s the air coming in. Now then, I’ll screw on the glass. Are you all right?”

“All right,” replied Rooney, telling, as he said himself afterwards, “one of the biggist lies he iver towld in his life!”

The glass was screwed on, and the learner was effectually cut off from all connection with the outer air, save through the slight medium of an india-rubber pipe.

Having thus screwed him up—or in—Baldwin gave him the patronising pat on the helmet, as a signal for him to descend, but Rooney stood tightly fixed to the ladder, and motionless.

Again Baldwin patted his head encouragingly, but still Rooney stood as motionless as one of the iron-clad warriors in the Tower of London. The fact was, his courage had totally failed him. He was ashamed to come up, and could not by any effort of will force himself to go down.

“Why, what’s wrong?” demanded Baldwin, looking in at the glass, which, however, was so clouded with the inmate’s breath that he could only be seen dimly. It was evident that Rooney was speaking in an excited voice, but no sound was audible through that impervious mass of metal and glass. Baldwin was therefore about to unscrew the mouth-glass, when accident brought about what Rooney’s will could not accomplish. In attempting to move, the poor pupil missed his hold, or slipped somehow, and fell into the sea with a sounding splash.