1. RP 6160/1 Reference (shelfmark): RP 6160/1 Title: Scope & Content: Autograph Letter Signed to publisher of ‘Tractactus Logico-Philosophicus’, C.K. Ogden. Trattenbach bei Kirchberg am Weschel, Lower Austria Creation dates: 23 April 1922 Collection Area: Western Manuscripts Languages: Undetermined Date Range: 29 May 1996 Extent: 26 photocopies
2. RP 6160/2 Reference (shelfmark): RP 6160/2 Title: Scope & Content: Typed ‘Logisch-Philosophische Abhandlung’ (from Annalen der Naturphilosophie) with autograph corrections, marginal comments and printing instructions, Leipzig Creation dates: 1921 Collection Area: Western Manuscripts Languages: Undetermined Date Range: 29 May 1996 Extent: 66 photocopies