Dr Francis Buchanan, later known as Francis Hamilton or Francis Buchanan-Hamilton, was a Scottish physician who made significant contributions as a geographer, zoologist, and botanist while living in India. He was born at Bardowie, Scotland, and studied medicine at the University of Edinburgh, graduating in 1783. He also studied botany. He first served on merchant ships to Asia and then joined the Bengal Medical Service in 1794. Buchanan's training was ideal as a surgeon naturalist for a political mission to the Kingdom of Ava in Burma under Captain Symes. The Ava mission set sail on the Sea Horse and passed the Andaman Islands, Pegu, and Ava before returning to Calcutta. Subsequently Buchanan-Hamilton was asked to survey South India. He conducted a survey of Mysore in 1800 and a survey of Bengal from 1807-1814. For the survey of Bengal he was asked to report on topography, history, antiquities, the condition of the inhabitants, religion, natural productions (particularly fisheries, forests, mines, and quarries), agriculture (covering vegetables, implements, manure, floods, domestic animals, fences, farms, and landed property, fine and common arts, and commerce (exports and imports, weights and measures, and conveyance of goods). His conclusions were made into a series of reports, of which these papers are the manuscripts. He also collected and described many new plants in the region, and collected a series of watercolours of Indian and Nepalese plants and animals, probably painted by Indian artists, which are now in the library of the Linnean Society of London. He succeeded William Roxburgh to become the superintendent of the Calcutta botanical garden in 1814, but had to return to Britain in 1815 due to his ill health and in the same year he inherited his mother's estate and in consequence took her surname of Hamilton, referring to himself as "Francis Hamilton, formerly Buchanan" or simply "Francis Hamilton". However, he is variously referred to by others as "Buchanan-Hamilton", "Francis Hamilton Buchanan", or "Francis Buchanan Hamilton". From 1815 until 1829 he was Regius Keeper of the Royal Botanic Garden in Edinburgh replacing Dr William Roxburgh.