1. RP 2561 Reference (shelfmark): RP 2561 Title: Scope & Content: Various copy letters Creation dates: 23 May 1873 - [1880] Collection Area: Western Manuscripts Languages: English and German Date Range: [1979-1985] Extent: 3 photocopies
2. RP 2561/1 Reference (shelfmark): RP 2561/1 Title: Scope & Content: MARX, Karl. Autograph Letter Signed. Manchester Creation dates: 23 May 1873 Collection Area: Western Manuscripts Languages: German Date Range: [1979-1985] Extent: 1 photocopy