Papers relating to the campaign to prevent the closure of the Cambrian Coast line and for improvements to the the infrastructure of the line and train services. The files include correspondence with supporters, British Rail, Members of Parliament, local authorities and government departments, minutes of meetings, publicity material, press coverage, reports, statistical and financial information, papers relating to television and press coverage.

A letter dated 28 April 1925 from J. Rhosydd Williams, Rhosllannerchrugog to Sir John Ballinger (1860-1933), first librarian of the National Library of Wales, containing information about William Jones, chandler, Porthmadog, who founded a Church of Christ at Porthmadog, and also particulars about the Scottish Baptists church at Criccieth and about Dr W. Jones Williams, Middlesborough.

Papers of the family of Jones and Pughe-Jones of Ynysgain, Cricieth, Caernarfonshire, 1501-[c. 1955], including deeds, mostly relating to the Cricieth area and to Merionethshire, 1501-1890; and an account book, 1614-1918.