A bound volume of manuscripts containing letters written by Carneddog to Thomas Richards, Librarian of the University College of North Wales, 1937; poetry and notes; an account of the building cost of Bethania chapel in Beddgelert, 1822; the hymns of Rev. Peter Williams, Carmarthen; miscellaneous papers regarding Llanfrothen parish, Merioneth and Beddgelert parish, Caernarfonshire,1839, 1840, 1847; receipts of rent paid for Gwastad Agnes farm, Beddgelert, 1849-1850; a collection of autographs of eminent Welsh figures; letters to Carneddog from various correspondents.
25 scrapbooks, mainly of newspaper cuttings, divided into poetry, gleanings, genealogy and death notices.
A printed publication O Greigiau'r Grug signed and presented by Carneddog to J.W. Jones of Blaenau Ffestiniog, together with an accompanying letters in which Carneddog complains of ill health and troubles relating the publication of the volume aforementioned.