Whenever he could spare the time he held afternoon scribbling classes for the animals in the Great Hollow. And they were very well attended. He found the monkeys, of course, the easiest to teach and, because they were so clever, he made some of them into assistant teachers. But the zebras were quite bright too. The Doctor discovered that these intelligent beasts had ways of marking and twisting the grasses to show where they had smelled lions about—though, happily, they did not have to use this trick in the Animals' Paradise but had brought it with them when they had swum across from the mainland of Africa.
The Doctor's pets found it quite thrilling to go through the mail that arrived each day to see if there were any letters for them. At the beginning of course there wasn't much. But one day Quip had returned from Puddleby with an answer to the Doctor's letter to the Cats'-Meat-Man. Mr. Matthew Mugg had written (through his wife) that he had hung the letter for Cheapside on an apple tree in the garden where the sparrow would surely see it when he arrived. The windows of the house were all right, he wrote; but the back door could do with a coat of paint.
And while Quip had been waiting for this letter to be written he had filled in the time at Puddleby by gossiping with all the starlings and blackbirds in the Doctor's garden about the wonderful new Animals' post office on the island of No-Man's-Land. And pretty soon every creature in and around Puddleby had got to hear of it.
After that, of course, letters began to arrive at the houseboat for the Doctor's pets. And one morning, when the mail was sorted, there was a letter for Dab-Dab from her sister; one for the white mouse written by a cousin from the Doctor's bureau drawer; one for Jip from the collie who lived next door in Puddleby and one for Too-Too, telling him he had a new family of six young ones in the rafters of the stable. But there was nothing for Gub-Gub. The poor pig was nearly in tears at being left out. And when the Doctor went into town that afternoon Gub-Gub asked could he come along.
The next day the post-birds complained that the mail was an extra heavy one. And when it was sorted, there were ten thick letters for Gub-Gub and none for anybody else. Jip got suspicious about this and looked over Gub-Gub's shoulder while he opened them. In each one there was a banana skin.
"Who sent you those?" asked Jip.
"I sent them to myself," said Gub-Gub, "from Fantippo yesterday. I don't see why you fellows should get all the mail. Nobody writes to me, so I write to myself."
[CHAPTER II]
CHEAPSIDE
It was a great day at the Doctor's post office when Cheapside, the London sparrow, arrived from Puddleby to look after the city deliveries for Fantippo.