'In the extreme north of Polistarchia,' said Mr. Noah instructively, 'lies a town called Somnolentia. It used to be called Briskford in happier days. A river then ran through the town, a rapid river that brought much gold from the mountains. The people used to work very hard to keep the channel clear of the lumps of gold which continually threatened to choke it. Their fields were then well-watered and fruitful, and the inhabitants were cheerful and happy. But when the Hippogriff was let out of the book, a Great Sloth got out too. Evading all efforts to secure him, the Great Sloth journeyed northward. He is a very large and striking animal, and by some means, either fear or admiration, he obtained a complete ascendancy over the inhabitants of Briskford. He induced them to build him a temple of solid gold, and while they were doing this the river bed became choked up and the stream was diverted into another channel far from the town. Since then the place is fallen into decay. The fields are parched and untilled. Such water as the people need for drinking is drawn by great labour from a well. Washing has become shockingly infrequent.' 'Are we to teach the dirty chaps to wash?' asked Philip in disgust. 'Do not interrupt,' said Mr. Noah. 'You destroy the thread of my narrative. Where was I?' 'Washing infrequent,' said Lucy; 'but if the fields are dried up, what do they live on?' 'Pine-apples,' replied Mr. Noah, 'which grow freely and do not need much water. Gathering these is the sole industry of this degraded people. Pine-apples are not considered a fruit but a vegetable,' he added hastily, seeing another question trembling on Philip's lips. 'Whatever of their waking time can be spared from the gathering and eating of the pine-apples is spent in singing choric songs in honour of the Great Sloth. And even this time is short, for such is his influence on the Somnolentians that when he sleeps they sleep too, and,' added Mr. Noah impressively, 'he sleeps almost all the time. Your deed is to devise some means of keeping the Great Sloth awake and busy. And I think you've got your work cut out. When you've disposed of the Great Sloth you can report yourself to me here. I shall remain here for some little time. I need a holiday. The parrot will accompany you. It knows its way about as well as any bird in the land. Good-night. And good luck! You will excuse my not being down to breakfast.' And the next morning, dewy-early, Philip and Lucy and the parrot went aboard the yacht and loosed her from her moorings, and Lucy showed Philip how to steer, and the parrot sat on the mast and called out instructions.