Our Rover had to confess that he had never heard before of anything but just 'the sea', and not much of that. 'But I have been to the moon,' he said, and he told his new friend as much about it as he could make him understand.

The mer-dog enjoyed Rover's tale immensely, and believed at least half of it. 'A jolly good yarn,' he said, 'and the best I have heard for a long time. I have seen the moon. I go on top occasionally, you know, but I never imagined it was like that. But my word! that sky-pup has got a cheek. Three Rovers! Two's bad enough, but three's impossible! And I don't believe for a moment he is older than I am; if he is a hundred yet, I should be mighty surprised.'

He was probably quite right too. The moon-dog, as you noticed, exaggerated a lot. 'And anyway,' went on the mer-dog, 'he only gave himself the name. Mine was given me.'

'And so was mine,' said our little dog.

'And for no reason at all, and before you had begun to earn it any way. I like the Man-in-the-Moon's idea. I shall call you Roverandom, too; and if I were you I should stick to it — you never do seem to know where you are going next! Let's go down to supper!'

It was a fishy supper, but Roverandom soon got used to that; it seemed to suit his webby feet. After supper he suddenly remembered why he had come all the way to the bottom of the sea; and off he went to look for Artaxerxes. He found him blowing bubbles, and turning them into real balls to please the little mer-children.

'Please, Mr Artaxerxes, could you be bothered to turn me — ' began Roverandom.

'O! go away!' said the wizard. 'Can't you see I can't be bothered? Not now, I'm busy.' This is what Artaxerxes said all too often to people he did not think were important. He knew well enough what Rover wanted; but he was not in a hurry himself.

So Roverandom swam off and went to bed, or rather roosted in a bunch of seaweed growing on a high rock in the garden. There was the old whale resting just underneath; and if anyone tells you that whales don't go down to the bottom or stop there dozing for hours, you need not let that bother you. Old Uin was in every way exceptional.

'Well?' he said. 'How have you got on? I see you are still toy-size. What's the matter with Artaxerxes? Can't he do anything, or won't he?'

'I think he can,' said Roverandom. 'Look at my new shape! But if ever I try to get onto the matter of size, he keeps on saying how busy he is, and he hasn't time for long explanations.'

'Umph! ' said the whale, and knocked a tree sideways with his tail — the swish of it nearly washed Roverandom off his rock. 'I don't think that PAM will be a success in these parts; but I shouldn't worry. You'll be all right sooner or later. In the meanwhile there are lots of new things to see tomorrow. Go to sleep! Good-bye!' And he swam off into the dark. The report that he took back to the cove made old Psamathos very angry all the same.

The lights of the palace were all turned off. No moon or star came down through that deep dark water. The green got gloomier and gloomier, until it was all black, and there was not a glimmer, except when big luminous fish went by slowly through the weeds. Yet Roverandom slept soundly that night, and the next night, and several nights after. And the next day, and the day after, he looked for the wizard and couldn't find him anywhere.

One morning when he was beginning already to feel quite a sea-dog and to wonder if he had come to stay there for ever, the mer-dog said to him: 'Bother that wizard! Or rather, don't bother him! Give him a miss today. Let's go off for a really long swim! '

On they went, and the long swim turned into an excursion lasting for days. They covered a terrific distance in the time; they were enchanted creatures, you must remember, and there were few ordinary things in the seas that could keep up with them. When they got tired of the cliffs and mountains at the bottom, and of the racing runs in the middle heights, they rose up and up and up, right through the water for a mile and a bit; and when they got to the top, no land was to be seen.

The sea all round them was smooth and calm and grey. Then it suddenly ruffled and went dark in patches under a little cold wind, the wind at dawn. Swiftly the sun looked up with a shout over the rim of the sea, red as if he had been drinking hot wine; and swiftly he leaped into the air and went off for his daily journey, turning all the edges of the waves golden and the shadows between them dark green. A ship was sailing on the margin of the sea and the sky, and it sailed right into the sun, so that its masts were black against the fire.

'Where's that going to?' asked Roverandom.

'O! Japan or Honolulu or Manila or Easter Island or Thursday or Vladivostok, or somewhere or other, I suppose,' said the mer-dog, whose geography was a bit vague, in spite of his hundreds of years of boasted prowlings. 'This is the Pacific, I believe; but I don't know which part — a warm part, by the feel of it. It's rather a large piece of water. Let's go and look for something to eat! '

When they got back, some days later, Roverandom at once went to look for the wizard again; he felt he had given him a good long rest.

'Please, Mr. Artaxerxes, could you bother — he began as usual.

'No! I could not!' said Artaxerxes, even more definitely than usual. This time he really was busy, though. The Complaints had come in by post. Of course, as you can imagine, all kinds of things go wrong in the sea, that not even the best PAM in the ocean could prevent, and some of which he is not even supposed to have anything to do with. Wrecks come down plump now and again on the roof of somebody's sea-house; explosions occur in the sea-bed (O yes! they have volcanoes and all that kind of nuisance quite as badly as we have) and blow up somebody's prize flock of goldfish, or prize bed of anemones, or one and only pearl-oyster, or famous rock and coral garden; or savage fish have a fight in the highway and knock mer-children over; or absent-minded sharks swim in at the dining-room window and spoil the dinner; or the deep, dark, unmentionable monsters of the black abysses do horrible and wicked things.

The mer-folk have always put up with all this, but not without complaining. They liked complaining. They used of course to write letters to The Weekly Weed, The Mer-mail, and Ocean Notions; but they had a PAM now, and they wrote to him as well, and blamed him for everything, even if they got their tails nipped by their own pet lobsters. They said his magic was inadequate (as it sometimes was) and that his salary ought to be reduced (which was true but rude); and that he was too big for his boots (which was also near the mark: they should have said slippers, he was too lazy to wear boots often); and they said lots besides to worry Artaxerxes every morning, and especially on Mondays. It was always worst (by several hundred envelopes) on Mondays; and this was a Monday, so Artaxerxes threw a lump of rock at Roverandom, and he slipped off like a shrimp from a net.

He was jolly glad when he got out into the garden to find that he was still unchanged in shape; and I dare say if he had not removed himself quick the wizard would have changed him into a sea-slug, or sent him to the Back of Beyond (wherever that is), or even to Pot (which is at the bottom of the deepest sea). He was very annoyed, and he went and grumbled to the sea-Rover.

'You'd better give him a rest till Monday is over, at any rate,' advised the mer-dog; 'and I should miss out Mondays altogether, in future, if I were you. Come and have another swim! '

After that Roverandom gave the wizard such a long rest that they almost forgot about one another — not quite: dogs don't forget lumps of rock very quickly. But to all appearances Roverandom had settled down to become a permanent pet of the palace. He was always off somewhere with the mer-dog, and often the mer-children came along as well. They were not as jolly as real, two-legged children in Roverandom's opinion (but then of course Roverandom did not really belong to the sea, and was not a perfect judge), but they kept him happy; and they might have kept him there for ever and have made him forget little boy Two in the end, if it had not been for things that happened later. You can make up your mind whether Psamathos had anything to do with these events, when we come to them.