1. DMO/12 Reference (shelfmark): DMO/12 Title: DMO Secret. France Collection Area: Map Collections Languages: English Date Range: 1888-1903 Extent: 1 volume
2. DMO/ADD Reference (shelfmark): DMO/ADD Title: Separate reports, not bound together Collection Area: Map Collections Languages: English Date Range: 1871-1938 Extent: 39 volumes, 45 booklets, 13 fascicles, comprising ca 5,500 pages, 126 maps, and 29 photographs.
3. DMO/2 Reference (shelfmark): DMO/2 Title: DMI Secret. 'France' Collection Area: Map Collections Languages: English Date Range: 1888-1890 Extent: 1 volume
4. DMO/3 Reference (shelfmark): DMO/3 Title: DMI Secret. 'Colonies' Collection Area: Map Collections Languages: English Date Range: 1879-1890 Extent: 1 volume
5. DMO/4 Reference (shelfmark): DMO/4 Title: DMO Secret. General Subjects I Collection Area: Map Collections Languages: English Date Range: 1886-1892 Extent: 1 volume
6. DMO/5 Reference (shelfmark): DMO/5 Title: DMO Secret. General Subjects II Collection Area: Map Collections Languages: English Date Range: 1893-1896 Extent: 1 volume
7. DMO/6 Reference (shelfmark): DMO/6 Title: DMO Secret. General Subjects III Collection Area: Map Collections Languages: English Date Range: 1896-1901 Extent: 1 volume
8. DMO/7 Reference (shelfmark): DMO/7 Title: DMO Secret. General Subjects IV Collection Area: Map Collections Languages: English Date Range: 1901-1905 Extent: 1 volume
9. DMO/9 Reference (shelfmark): DMO/9 Title: DMO Secret. Foreign Countries: Asia Collection Area: Map Collections Languages: English Date Range: 1889-1905 Extent: 1 volume
10. DMO/11 Reference (shelfmark): DMO/11 Title: DMO Secret. Egypt and Soudan Collection Area: Map Collections Languages: English Date Range: 1886-1898 Extent: 1 volume