A bet signed by Winston Churchill is up for auction at Dreweatts & Bloomsbury.
The lot is expected to sell for around £20,000-25,000 ($28,560-35,700).
During a dinner party in Minneapolis in 1901, American businessman James C Young bet Churchill �100 (the equivalent of �11,000 today) that the British Empire would crumble following the death of Queen Victoria.
Churchill enthusiastically took him up on his bet, which was witnessed by the poet Richard Le Gallienne.
The document reads: "Mr. James C. Young bets Mr. Winston Churchill - one hundred pounds even - that within ten years from this date the British Empire will be substantially reduced by loss in Australia, or Canada, or India equal to a quarter by population of one of these provinces…"
It's signed by all three men.
A photograph of Queen Victoria holding a baby Edward VIII, flanked by her son Edward VII and her grandson George V is valued at �5,000-6,000 ($7,140-8,568).
All three adults have signed the photo, which was taken at Edward VIII's christening at White Lodge in Richmond Park, London in 1894.
The shoot produced several versions of this scene, known as the Four Generations, although this is the only example of this particular photograph extant.
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