1. IOR/L/MIL/7/569 Reference (shelfmark): IOR/L/MIL/7/569 Title: Collection 4/1 Report by the Defence Committee on General Scheme of Coastal Defence for India (1879); Colonel Crossman's Report on Defences of Aden and Perim (1882). Collection Area: India Office Records and Private Papers Languages: English Date Range: 1879-1882 Extent: 1 file
2. IOR/L/MIL/7/570 Reference (shelfmark): IOR/L/MIL/7/570 Title: Collection 4/2 Commencement of operations, estimated costs and financial arrangements. Collection Area: India Office Records and Private Papers Languages: English Date Range: 1883-1884 Extent: 1 file
3. IOR/L/MIL/7/571 Reference (shelfmark): IOR/L/MIL/7/571 Title: Collection 4/3 Scheme for temporary defence of Aden against an unexpected attack. Collection Area: India Office Records and Private Papers Languages: English Date Range: 1884-1885 Extent: 1 file
4. IOR/L/MIL/7/572 Reference (shelfmark): IOR/L/MIL/7/572 Title: Collection 4/4 Fort Tarshayne, Aden: plans and proposals. Collection Area: India Office Records and Private Papers Languages: English Date Range: 1884 Extent: 1 file
5. IOR/L/MIL/7/573 Reference (shelfmark): IOR/L/MIL/7/573 Title: Collection 4/5 Cost of experimental mountings for heavy guns. Collection Area: India Office Records and Private Papers Languages: English Date Range: 1884 Extent: 1 file
6. IOR/L/MIL/7/574 Reference (shelfmark): IOR/L/MIL/7/574 Title: Collection 4/6 Fort Morbut, Aden: plans and proposals. Collection Area: India Office Records and Private Papers Languages: English Date Range: 1884-1885 Extent: 1 file
7. IOR/L/MIL/7/575 Reference (shelfmark): IOR/L/MIL/7/575 Title: Collection 4/7 Progress of the defensive works at Aden, as finally revised by Captain Lewis R.E. Collection Area: India Office Records and Private Papers Languages: English Date Range: 1885 Extent: 1 file
8. IOR/L/MIL/7/576 Reference (shelfmark): IOR/L/MIL/7/576 Title: Collection 4/8 System of locks needed for the fortress of Aden. Collection Area: India Office Records and Private Papers Languages: English Date Range: 1884-1886 Extent: 1 file
9. IOR/L/MIL/7/577 Reference (shelfmark): IOR/L/MIL/7/577 Title: Collection 4/9 Progress of works on forts Morbut and Tarshayne. Collection Area: India Office Records and Private Papers Languages: English Date Range: 1885-1886 Extent: 1 file
10. IOR/L/MIL/7/578 Reference (shelfmark): IOR/L/MIL/7/578 Title: Collection 4/10 Fort Tarshayne: plans and proposals. Collection Area: India Office Records and Private Papers Languages: English Date Range: 1885-1886 Extent: 1 file