Maps Of The Orinoco-Essequibo Region, South America. Compiled For The Commission Appointed By The President Of The United States "To Investigate And Report Upon The True Divisional Line Between The Republic Of Venezuela And British Guiana". Commissioners, David J. Brewer, President, Richard H. Alvey, Frederic R. Coudert, Andrew D. White, Daniel C. Gilman, Severo Mallet-Prevost, Secretary. Washington. February, 1897