Thomas Jefferys

Example of Jefferys' work. The eastern part of Siberia as depicted by the Second Kamchatka Expedition.

Thomas Jefferys ( 1719 – 1771), "Geographer to King George III", was an English cartographer who was the leading map supplier of his day. He engraved and printed maps for government and other official bodies and produced a wide range of commercial maps and atlases, especially of North America.

Early work As "Geographer to the Prince of Wales", he produced A Plan of all the Houses, destroyed & damaged by the Great Fire, which began in Exchange Alley Cornhill, on Friday March 25, 1748. He produced The Small English Atlas with Thomas Kitchin, and he engraved plans of towns in the English Midlands. The American Atlas was reissued in 1776, expanded in response to growing hostilities between the British and the Americans; it contains maps by Joshua Fry, Peter Jefferson, Lewis Evans, and others.

In 1754, Jefferys took a robust and public stance in the controversy with the French on the boundary of Nova Scotia and Acadia, which arose in the time and context of Father Le Loutre's War, which is commonly held to have begun in 1749 and ended with the expulsion of the Acadians in 1755.

Jefferys posthumously lent his name in 1776 to The American Atlas: Or, A Geographical Description Of The Whole Continent Of America. It contains works by, amongst others, Joshua Fry and Peter Jefferson.

Maps of English counties Jefferys commissioned surveys and published maps of several English counties. These were large-scale maps with several sheets for each county; in the case of Bedfordshire and Huntingdonshire the scale was two inches to one mile (1:31680). published 1765, reprinted 1983 Huntingdonshire, surveyed 1766, published 1768 Oxfordshire, surveyed 1766-67, published (by Andrew Dury) 1767 County Durham, published 1768 Buckinghamshire, surveyed 1766-68 by John Ainslie, published 1770, reprinted 2000 Westmoreland, surveyed 1768, published 1770 Yorkshire, surveyed 1767-70 by John Ainslie, published 1771-72 Cumberland, surveyed 1770-71, published 1774 Northamptonshire, survey (originally by Thomas Eyre) revised 1771, published 1779

After the death of Jefferys, these maps were re-issued by other map publishers such as William Faden.