A photograph of a mysterious footprint believed to be that of a yeti has sold for £3,500.
A Christie's auction in London, themed on exploration and travel, included Captain Lawrence Oates' sleeping bag case from his ill-fated South Pole expedition with Captain Scott in 1912.
|A 1951 image of a footprint
The 'yeti' footprint was photographed in the Menlung Basin in the Himalayas in 1951.
A team of mountaineers travelled to the region on a reconnaissance mission before attempting to conquer Everest for the first time, a feat achieved two years later.
A member of the expedition, Tom Bourdillon, sent it to his friend Michael Davies with an inscription on the reverse.
"Dear Mick, here are the footprint photos: sorry for the delay. We came across them on a high pass on the Nepal-Tibet watershed during the 1951 Everest expedition.