1. IOR/L/PS/20/FO89/1 Reference (shelfmark): IOR/L/PS/20/FO89/1 Title: Eastern Department: Secret series Part I January to March 1911 Collection Area: India Office Records and Private Papers Languages: English Date Range: Feb 1912 Extent: xvi, 206pp
2. IOR/L/PS/20/FO89/2 Reference (shelfmark): IOR/L/PS/20/FO89/2 Title: Eastern Department: Secret series Part II April to June 1911 Collection Area: India Office Records and Private Papers Languages: English Date Range: Feb 1912 Extent: xi, 114pp 2 maps
3. IOR/L/PS/20/FO89/3 Reference (shelfmark): IOR/L/PS/20/FO89/3 Title: Eastern Department: Secret series Part III July to September 1911 Collection Area: India Office Records and Private Papers Languages: English Date Range: Mar 1912 Extent: ix, 125pp
4. IOR/L/PS/20/FO89/4 Reference (shelfmark): IOR/L/PS/20/FO89/4 Title: Eastern Department: Secret series Part IV October to December 1911 Collection Area: India Office Records and Private Papers Languages: English Date Range: Jun 1912 Extent: vii, 52pp