1. DMO/1/2__TAB__ Reference (shelfmark): DMO/1/2__TAB__ Title: Tables showing the power, &c., of British, French, German, Italian, and Russian heavy guns. Corrected to 1.7.86. Compiled in the Department of the Director of Artillery. 1886. London: Printed at the War Office by Harrison & Sons, 1886. Collection Area: Map Collections Languages: English Date Range: 1886 Extent: 19 pages
2. DMO/1/20 Reference (shelfmark): DMO/1/20 Title: 'Organization for Defence of Fortified Seaports in Foreign Countries.' By H.B. (Henry Brackenbury) Collection Area: Map Collections Languages: English Date Range: 1890 Extent: 15 pages