In 1958 an elderly gentleman staying at the Castle Hotel in Berwick-upon-Tweed gave the receptionist a doodle he had made on the hotel’s notepaper. She kept it in a box and 43 years later, on the advice of Antiques Roadshow, sold it at auction for £8,000.

‘I don’t think anyone since Turner has looked at the sea with such an original eye’

A contemporary photograph shows that gentleman in his trademark trilby, dark suit and tie – no casual wear for L.S.