Roald Dahl had five children with his first wife, Patricia Neal

A picture of his first wife Patricia Neal with children under her skirt was the top item, selling for �7,500.

Other lots in Monday's Christie's sale included artwork by Quentin Blake and Gerald Scarfe, which went for �2,800 and �5,000 respectively.

Auction proceeds will go to The Roald Dahl Museum and Story Centre, which opens in Buckinghamshire in June.

"It was a wonderful evening and a fantastic result, exceeding all our expectations, " said Dahl's widow Liccy.

Auctioneer Duncan McEuen said it had been a great honour to be involved in the auction.

Famous stories

"The sale was 100% sold, with many photographs easily exceeding their pre-sale estimates," he said. "It was a wonderful tribute to one of Britain's most-loved writers."

This photograph of Dahl was taken in 1930

Two photographs of Baghdad market taken by Dahl in 1940 fetched �5,500 and his picture of the Arch of Ctesiphon in Iraq made �6,000.

A giant anglepoise lamp sold for �4,000.

Dahl, who died in 1990, is famed for his stories such as Charlie And The Chocolate Factory and James and the Giant Peach. As a young boy, he developed a passion for photography which continued throughout his life.

Dahl's photographs were reprinted by his 18-year-old grandson Luke Kelly.

Dahl was born in Wales to Norwegian parents but he spent many years living in the Buckinghamshire village of Great Missenden, where the museum will open.

It will include galleries telling the story of the writer's life and how he worked.