1. DMO/1 Reference (shelfmark): DMO/1 Title: DMI Secret. 'General Subjects' Collection Area: Map Collections Languages: English Date Range: 1886-1890 Extent: 1 volume
2. DMO/1/15 Reference (shelfmark): DMO/1/15 Title: 'Table showing calibres of rifles of foreign countries.' Collection Area: Map Collections Languages: English Date Range: 1889 Extent: 1 page
3. DMO/1/12 Reference (shelfmark): DMO/1/12 Title: 'Notes for the information of Officers attending foreign manoeuvres.' Collection Area: Map Collections Languages: English Date Range: 1889 Extent: 14 pages
4. DMO/1/4 Reference (shelfmark): DMO/1/4 Title: Approximate fighting strengths of the principal European armies. Collection Area: Map Collections Languages: English Date Range: 1887 Extent: 3 pages
5. DMO/1/9 Reference (shelfmark): DMO/1/9 Title: 'Instructions for the Defence of Submarine Mines by Fire from the Shore.' Collection Area: Map Collections Languages: English Date Range: 1887 Extent: 2 pages
6. DMO/1/14 Reference (shelfmark): DMO/1/14 Title: 'Official Secrets Act, 1889. (52 & 52 Vict.) (Ch. 52.)' Collection Area: Map Collections Languages: English Date Range: 1889 Extent: 5 pages
7. DMO/1/3 Reference (shelfmark): DMO/1/3 Title: Precis of details respecting the Small-Arms in use or under trial in England and Abroad. Collection Area: Map Collections Languages: English Date Range: 1887 Extent: 6 pages
8. DMO/1/10 Reference (shelfmark): DMO/1/10 Title: 'Comparative table of Horse and Field Artillery - English and Foreign. Compiled chiefly from information supplied by Intelligence Division, War Office.' Collection Area: Map Collections Languages: English Date Range: 1889 Extent: 1 page
9. DMO/1/7 Reference (shelfmark): DMO/1/7 Title: 'Reports on the Press of foreign countries. Printed for the use of the Foreign Office.' Collection Area: Map Collections Languages: English Date Range: 1887 Extent: 18 pages
10. 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