1. Mss Eur E290/30 Reference (shelfmark): Mss Eur E290/30 Title: Scope & Content: Sladen's letter book as Deputy Commissioner, Amherst District Collection Area: India Office Records and Private Papers Languages: English Date Range: 1872-1875 Extent: Unspecified
2. Mss Eur E290/29 Reference (shelfmark): Mss Eur E290/29 Title: Scope & Content: Letter book containing copies of Sladen's demi-official and personal letters Collection Area: India Office Records and Private Papers Languages: English Date Range: 1871-1880 Extent: Unspecified