Cyril broke it-- 'What shall we do ?' 'Go back to the shop and see if they haven't got the other half,' said the Psammead.

'I'll go to sand till you come back.

Cheer up! Even the bit you've got is SOME good, but it'll be no end of a bother if you can't find the other.' So Cyril went to the shop.

And the Psammead to sand.

And the other three went to dinner, which was now ready.