11. IOR/L/MIL/7/14648 Reference (shelfmark): IOR/L/MIL/7/14648 Title: Collection 327/1 Aden defences: survey of Steamer Point for site for position-finding stations. Collection Area: India Office Records and Private Papers Languages: English Date Range: 1887 Extent: 1 file
12. IOR/L/MIL/7/14649 Reference (shelfmark): IOR/L/MIL/7/14649 Title: Collection 327/2 Favourable reports on trials of Watkin position-finder at Bonisand Fort. Collection Area: India Office Records and Private Papers Languages: English Date Range: 1888 Extent: 1 file
13. IOR/L/MIL/7/14662 Reference (shelfmark): IOR/L/MIL/7/14662 Title: Collection 327/15 Deputation of Colonel H.S. Watkin to inspect Aden scheme. Collection Area: India Office Records and Private Papers Languages: English Date Range: 1896 Extent: 1 file
14. IOR/L/MIL/7/14664 Reference (shelfmark): IOR/L/MIL/7/14664 Title: Collection 327/17 Report by Colonel H.S. Watkin on Aden apparatus. Collection Area: India Office Records and Private Papers Languages: English Date Range: 1897 Extent: 1 file
15. IOR/L/MIL/7/14651 Reference (shelfmark): IOR/L/MIL/7/14651 Title: Collection 327/4 Aden defences: trial of lead-covered cable, supply of instruments and steel roofs. Collection Area: India Office Records and Private Papers Languages: English Date Range: 1888-1891 Extent: 1 file
16. IOR/L/MIL/7/14656 Reference (shelfmark): IOR/L/MIL/7/14656 Title: Collection 327/9 Aden defences: construction of an observing cell for officer commanding Royal Artillery. Collection Area: India Office Records and Private Papers Languages: English Date Range: 1892 Extent: 1 file
17. IOR/L/MIL/7/14652 Reference (shelfmark): IOR/L/MIL/7/14652 Title: Collection 327/5 Notes, drawings and memoranda on the application of position-finders to coast batteries. Collection Area: India Office Records and Private Papers Languages: English Date Range: 1889-1895 Extent: 1 file
18. IOR/L/MIL/7/14654 Reference (shelfmark): IOR/L/MIL/7/14654 Title: Collection 327/7 Repair and maintenance of position-finding equipment: appointment of staff sergeant artificers at Bombay and Aden. Collection Area: India Office Records and Private Papers Languages: English Date Range: 1890-1892 Extent: 1 file
19. IOR/L/MIL/7/14658 Reference (shelfmark): IOR/L/MIL/7/14658 Title: Collection 327/11 Report on the whole of the requirements for completion of Aden scheme. Collection Area: India Office Records and Private Papers Languages: English Date Range: 1893-1894 Extent: 1 file