Howard Jacobson ponders why he's always associated Christmas with the sea.

Strange, he reckons, given he's not exactly maritime by temperament.

'Long ago at Blackpool,' he writes, 'I was lifted onto a donkey and afterwards told to make a sandcastle, but I fell off the donkey and wilder boys in Brillo-pad swimming trunks trampled over my battlements'.

He looks to Matthew Arnold for an explanation of this 'mysterious nexus of sea and Santa'.

Producer: Adele Armstrong