11. IOR/L/PS/9/60 Reference (shelfmark): IOR/L/PS/9/60 Title: Vol 10 Political and Secret Letters Received from Aden Collection Area: India Office Records and Private Papers Languages: English Date Range: 1903 Extent: 1 volume
12. IOR/L/PS/9/61 Reference (shelfmark): IOR/L/PS/9/61 Title: Vol 11 Political and Secret Letters Received from Aden Collection Area: India Office Records and Private Papers Languages: English Date Range: 1904-1911 Extent: 1 volume