Joseph Robson's 18th century map of the mouth of Manitoba's Churchill River, published in 1752

Jefferys, Thomas. A Draught of Churchill River Lat'd. 59°00'North, Var 16°40 [facisimle]. 1:76,032. In: Joseph Robson. An Account of Six Years Residence in Hudson's Bay, From 1733 to 1736 and 1744 to 1747. [London]: Printed for J. Payne and J. Bouquet in Pater-Nofter-Row, [1752], plate No. II. As reproduced by, S.R. Publsihers Limited, Johnson Reprint Corporation 1965.