Deeds and documents, 1728-1988, relating to the Trewern Hall estate, including the Plough and Harrow Inn. They include documents relating to proposed improvements to cottages, 1937-1938, and the restoration of Trewern Hall, 1983-1988; farm and household accounts, with miscellaneous financial papers and vouchers, 1952-1986; correspondence and papers concerning agricultural improvements and grant applications, 1977-1985; correspondence concerning the tenancy of Plas Newydd, Trewern, 1982-1984; personal and family papers, 1949-1984, relating to William Herbert Chapman (1955-1982) and to Murray Lloyd Chapman, including the latter's research notes and papers, on the history of Trewern and Montgomeryshire families and his work in civil engineering, 1973-1986. Plans of the estate and proposed improvements to the farm buildings accompanied some of the papers. Papers relating to Phase 2 Restoration of Trewern Hall, 1990-1993; were received in 2007, including a diary of events in two volumes; papers relating to Ivor William Lloyd Chapman and Margaret Eleanor Chapman; and Gregory-Allen papers. Four further collections were received in August 2014, 2017, September 2018 and September 2019. The 2014 group remains uncatalogued.