Digital Maps and Geospatial Data | Princeton University

Reduction of the map of British Guiana compiled from the surveys executed under Her Majesty's Commission from 1841 to 1844, and under the direction of the Royal Geographical Society from 1835 to 1839, by Sir Robert H. Schomburgk, K.R.E., Ph.D. revised and corrected to the present time by Cathcart Chalmers Esq., Crown Surveyor of the Colony, and James Gay Sawkins Esq., Director of the Geological Survey of the West Indies and British Guiana, with additions by Charles B. Brown, Esq., 1875 Image Public content