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This is the first ever printed map that names Peak XV (as it was formerly known) as Mount Everest. It shows the lines of sight from which measurements were taken for the Great Trigonometrical Survey.
It took a number of years and many calculations by Radhanath Sickdhar, known as chief computer, before the announcement in 1856 that Peak XV was "most probably" the highest mountain in the world. It was calculated as 29,002 feet (8840 metres). The current height of the mountain, as measured by Global Positioning Satellite (GPS) is 29,035 feet (8850 metres) and geologists belive it is still growing.
This map appeared in an article by Colonel A.S. Waugh. The paper was called Mount Everest and Deodanga and was published in the Proceedings of the Royal Geographical Society, vol. 2 in 1858.
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