stay long under water at a time. Jack told me that to do so often was bad for the lungs, and, instead of affording us enjoyment, would ere long do us a serious injury. So we never stayed at the bottom as long as we might have done, but came up frequently to the top for fresh air, and dived down again immediately. Sometimes, when Jack happened to be in a humorous frame, he would seat himself at the bottom of the sea on one of the brain corals, as if he were seated on a large paddock-stool, and then make faces at me, in order, if possible, to make me laugh under water. At first, when he took me unawares, he nearly succeeded, and I had to shoot to the surface in order to laugh; but afterwards I became aware of his intentions, and, being naturally of a grave disposition, I had no difficulty in restraining myself. I used often to wonder how poor Peterkin would have liked to be with us; and he sometimes expressed much regret at being unable to join us. I used to do my best to gratify him, poor fellow, by relating all the wonders that we saw; but this, instead of satisfying, seemed only to whet his curiosity the more, so one day we prevailed on him to try to go down with us. But, although a brave boy in every other way, Peterkin was very nervous in the water, and it was with difficulty we got him to consent to be taken down, for he could never have managed to push himself down to the bottom without assistance. But no sooner had we pulled him down a yard or so into the deep clear water, than he began to struggle and kick violently, so we were forced to let him go, when he rose out of the water like a cork, gave a loud gasp and a frightful roar, and struck out for the land with the utmost possible haste.
Now, all this pleasure we were to forego, and when
