1. Philatelic 20/18/2 Reference (shelfmark): Philatelic 20/18/2 Title: Ewen Collection: Londonderry and Lough Swilly Railway Scope & Content: Railway letter stamps, covers and related material, provenance records and notes relating to the Londonderry and Lough Swilly Railway. Collection Area: Philatelic Collections Languages: English Date Range: 1891-1912 Extent: Section within volume.