Mark, who had been somewhat longer undressing than impatient Bevis, came in and did it, and there they both floated, much delighted. The water was between three and four feet deep. When Bevis’s papa found that they could not be kept from roaming, and were bent on boating on the Longpond, which was a very different thing to the shallow brook, where they were never far from shore, and out of which they could scramble, he determined to teach Bevis and his friend to swim. Till Bevis could swim, he should never feel safe about him; and unless his companion could swim too, it was of no use, for in case of accident, one would be sure to try and save the other, and perhaps be dragged down. They had begged very hard to be allowed to have one of the boats in order to circumnavigate the New Sea, which it was so difficult to walk round; and he promised them if they would really try and learn to swim, that they should have the boat as a reward. He took them to a place near the old quarry they had discovered, in one corner of Fir-Tree Gulf, where the bottom was of sand, and shelved gently for a long way out; a line of posts and rails running into the water, to prevent cattle straying, as they could easily do where it was shallow like this. The field there, too, was away from any road, so that they could bathe at all times. It was a sunny morning, and Bevis, eager for his lesson, had torn off his things, and dashed into the water, like Pan. “Now try one hand,” said his “governor.” “Let one hand lie on the water--put your arm out straight--and hold the rail with the other.” Bevis, rather reluctantly, did as he was told. He let go with his right hand, and stretched it out,--his left hand held him up just as easily, and his right arm seemed to float of itself on the surface. But now, as the muscles of his back and legs unconsciously relaxed, his legs drew up under him, and he bottomed with his feet and stood upright. “Why’s that?” he said. “Why did I come up like that?” “You must keep yourself a little stiff,” said the governor; “not rigid-- not quite stiff--just feel your muscles then.” Bevis did it again, and floated with one hand only on the rail: he found he had also to keep his left arm quite straight and firm. Then he had to do it with only two fingers on; while Mark and the governor stood still, that no ripple might enter his mouth, which was only an inch above the surface. Next, Mark was taken in hand, and learnt the same things; and having seen Bevis do it, he had not the least difficulty. The governor left them awhile to practise by themselves, and swam across to the mouth of the Nile, on the opposite side of the gulf. When he came back he found they had got quite confident; so confident, that Bevis, thinking to surpass this simple lesson, had tried letting go with both hands, when his chin immediately went under, and he struggled up spluttering.