Through The Looking Glass by Lewis Carroll Chapter 5 Page 24

But the Sheep only laughed scornfully, and went on with her knitting.

‘Are there many crabs here?’ said Alice.

‘Crabs, and all sorts of things,’ said the Sheep: ‘plenty of choice, only make up your mind. Now, what do you want to buy?’

‘To buy!’ Alice echoed in a tone that was half astonished and half frightened — for the oars, and the boat, and the river, had vanished all in a moment, and she was back again in the little dark shop.

‘I should like to buy an egg, please,’ she said timidly. ‘How do you sell them?’

‘Fivepence farthing for one — Twopence for two,’ the Sheep replied.