'On the projection of maps for military purposes. Memorandum and tables drawn up in the Intelligence Division of the War Office by Major L. Darwin, R.E. 1890.'
'Memorandum on the Canadian Pacific Railway considered from an Imperial point of view. Compiled at the Intelligence Department of the War Office, by Captain L. Darwin, R.E. London: Printed at the War Office, by Harrison & Sons, 1886.' With a memorandum on the strategic value of a new route to Japan, by E.F.G. Law.
On the projection of maps for military purposes. Memorandum and tables drawn up in the Intelligence Division of the War Office by Major L. Darwin, R.E. 1890.