A remarkable collection of autographed photographs of many of the world's most famous men and women - including Freud, Matisse, Oscar Wilde and Wallis Simpson - are to be sold next month.
On offer is an almost naked Mata Hari, the notorious First World War spy executed by the French, wearing little more than an elaborate head- dress and ankle chains, a quizzical-looking Sigmund Freud, the revolutionary psychiatrist, brandishing a cigar, and a ramrod-backed Charles Dickens staring out of the window.
The rare picture of the writer of such literary classics as Oliver Twist and Nicholas Nickleby is a signed carte-de-visite valued at $2,000 to $3,000 (pounds 1,500 to pounds 2,000) in the auction at Christie's East in New York on 17 April. Even more valuable is a large cabinet photograph of Annie Oakley, the pint-sized markswoman who could split a playing card held on edge at 30 paces, which is valued at up to $3,500.
Perhaps the best, however, is the portrait of Henri Matisse, the French painter and leader of the iconoclastic Fauves group, taken sitting respectably on a horse wearing a bowler hat ($3,000 to $4,000).
The photographs - more than 300 in all - were collected by a Boston investment property broker, M Wesley Marans.
The businessman began collecting the pictures 29 years ago after being shown an autographed photograph of the gangster Al Capone, which belonged to a psychiatrist friend. "The richness of the image, together with the intriguing signature, `spoke' to me," he explains.
He continued buying images for three decades, gathering photographs of celebrities taken throughout the world following the 1839 invention of photography.
Mr Marans has been forced to sell by the value of his collection, which he removed from his home 10 years ago.
"I have come to the conclusion that just as I have passionately enjoyed collecting and the quest, so should others have this pleasure, rather than locking the pictures in a bank vault," he writes in the foreword to the catalogue.