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Champion racehorse Persian War with writer Dick Francis (1920 - 2010), UK, 28th June 1970. (Photo by Dove/Daily Express/Getty Images)

Champion racehorse Persian War with writer Dick Francis (1920 - 2010), UK, 28th June 1970. (Photo by Dove/Daily Express/Getty Images)

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4th February 1950: Jockey and later thriller writer, Dick Francis on Mrs CA Hall-Hall's Grand National entry, Fighting Line the . (Photo by Ron Burton/Keystone/Getty Images)

4th February 1950:  Jockey and later thriller writer, Dick Francis on Mrs CA Hall-Hall's Grand National entry, Fighting Line the .  (Photo by Ron Burton/Keystone/Getty Images)

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Sport, Horse Racing, pic: 26th March 1956, 1956 Grand National at Aintree, The Queen Mother's horse Devon Loch ridden by Dick Francis is pictured leading ESB, ridden by Dave Dick over the last fence, Devon Loch, leading by some distance, was to slip on the run in in a comic way, and ESB, and Dave Dick won the race (Photo by Bentley Archive/Popperfoto via Getty Images/Getty Images)

Sport, Horse Racing, pic: 26th March 1956, 1956 Grand National at Aintree, The Queen Mother's horse Devon Loch ridden by Dick Francis is pictured leading ESB, ridden by Dave Dick over the last fence, Devon Loch, leading by some distance, was to slip on the run in in a comic way, and ESB, and Dave Dick won the race  (Photo by Bentley Archive/Popperfoto via Getty Images/Getty Images)

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British crime writer and former jockey Dick Francis (1920 - 2010) has his hat adjusted by his wife Mary, on the day he received an OBE, London, 20th March 1984. (Photo by Mike Lawn/Express/Getty Images)

British crime writer and former jockey Dick Francis (1920 - 2010) has his hat adjusted by his wife Mary, on the day he received an OBE, London, 20th March 1984. (Photo by Mike Lawn/Express/Getty Images)

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CANADA - OCTOBER 20: A Desire to see Canada at ground level got author Dick Francis on a cross-country 'mysery tour' train. The blockbuster start gave him his latest book. (Photo by Jeff Goode/Toronto Star via Getty Images)

CANADA - OCTOBER 20:  A Desire to see Canada at ground level got author Dick Francis on a cross-country 'mysery tour' train. The blockbuster start gave him his latest book.   (Photo by Jeff Goode/Toronto Star via Getty Images)