The commonplace book of Robert Roberts, Tyddyn y Felin, an assistant minister of 'Yr Hen Gapel', Llanuwchllyn, containing miscellaneous records and extracts, relating particularly to the affairs of 'Yr Hen Gapel'; copies of notices to quit to tenants of the Glanllyn estate, 1830; a list of persons qualified to serve on juries in Llanuwchllyn, 1834; correspondence relating to Coward's Trust, 1834; extracts from letters by emigrants to the United States of America, 1833-1835; 'Subscriptions when Revd. M. Jones came to Llanuwchllyn'; lists of houses in Llandrillo, Llangower, Llanyckil, Llanfawr, and Llanymowddwy; and lists of dissenting meeting-houses.

Miscellaneous essays, notes, etc., of a topographical and biographical nature, relating mainly to the parishes of Llanfor, Llanuwchllyn, and Llanycil, co. Merioneth, including an essay (62 pp.) on 'Hynafiaethau a Hynafiaid Ardal Celyn' [Cwm Celyn, parishes of Llanfor and Llanycil], by ' O letty'r chwilotwr', 1927; two short essays (19 pp. and 11 pp. respectively) on 'Hen Dyddynnod a Bythynod Dadfeiliedig Cwmtirmynach [ parish of Llanfor], ynghyd a preswylwyr olaf', the one by 'Brysiog', and the other bearing no name or pseudonym; a short essay (17 pp.) on 'Edward Jones y Wenallt' [? parish of Llanfor], by R. Price, Llansilin; notes by John Hughes on 'Hen Dyddynod Ardal y Parc'; notes by R. Prys Jones on 'Edward Foulke, Coedyfoel, Bala', who emigrated to America, 1698; and a copy of a paper on 'Hen Dyddynod Adfeiliedig y Plwy [ Llanuwchllyn], ag adgofion am rai o'u preswylwyr', read by Edw[ard] Edwards, to the Young People's Society of Yr Hen Gapel [the Congregational church, Llanuwchllyn]. Some of the essays noted were submitted for competition at local literary meetings.