1840
J. Löwenberg
1875
Brown, Charles B.
1:1m
1897
Venezuela-British Guiana Boundary Commission
1:2m
1897
Venezuela-British Guiana Boundary Commission
1:2m
1852
Humboldt, Alexander von
1832
Arrowsmith, John
1:5m
1898
HUGHES, William F.R.G.S
1851
Tallis, J. & F.
1:3m
1893
RODWAY, James.
1798
Bouchenroeder, F. Von
1:2m