In 1921, Lieut. Col. C.K. Howard Bury led the first reconnaissance expedition to Mount Everest, the world's highest peak. Before this time, the nearest photographs had been taken from Khampa Dzong, a distance of 100 miles. Tibet and Nepal were both inaccessible to western travellers. Photographs were made by several members of the team and a selection was printed on their return by the Autotype Company using the carbon process. This process allowed prints to be made in a range of different monochromatic hues. It was also a permanent process, not subject to the fading associated with the more common silver-based processes of the time. A list of fifty-seven titles of prints available for either 15/- per copy for approx. 17 x 14 in. or 10/- per copy for approx. 11½ x 9½ in. was published before May 1922.