A manuscript in the hand of David Richards ('Dewi Silin') containing transcripts of John Davies: A Display of Herauldry (Salop, 1716); 'cywyddau' and 'englynion' by Hugh Morys; 'Edeyrn Dafawd aur' (see Cwrtmawr MS 233); 'cywyddau' by Ieuan ab Hywel Swrdwal and Gruffudd ab Ieuan ab Llywelyn, and 'Chwedl Rhitta Gawr' from a transcript by Edward Williams ('Iolo Morganwg') of a manuscript of James Davies ('Iaco ap Dewi'); a 'Letter from Mr Owen [William Owen-Pughe], Author of the Welsh and English Dictionary, containing Remarks on the Structure of the Welsh Language, and on the Characteristic of the Gwentian Dialect ...', printed in William Coxe: An Historical Tour in Monmouthshire, part II (London, 1801), pp. 405-7; and 'cywyddau', an 'awdl' and 'englynion' by Hugh Morys, Jno. Davies ('o'r Rhiwlas'), William Miltwn, Doctor Sion Kent, Simwnt Fychan, Richart Phylip, Sion Philip and Sion Cain, and incomplete poems. Pasted on the inside lower cover is an imperfect printed prospectus of Seren Gomer, 1813.

A group of ten notebooks in the hand of D. Silvan Evans, mainly either relating to his contributions to Encyclopaedia Cambrensis. Y Gwyddoniadur Cymreig (Denbigh, 1856-79) or comprising glossaries and texts on Welsh orthography. Among the titles are 'Gwyddoniadur. List of Articles Contributed', 1853-6; 'Chwanegion at y Gwyddoniadur' (with 'Gee's Statement, 1854, and a receipt from D. S. Evans, 16 February 1856); 'Attotiad i Fynegai y [Gw]yddoniadur Cymreig]; 'Arddygraff yr Iaith Gymraeg: ar Gynllun y Parch. D. Silvan Evans, 1853' (Argraffedig yn Ninbych, 1854') [sic] (on the cover: 'Proof received, Feb. 25, 1854. Llythyraeth yr Iaith Gymraeg: Cofrestr Egwyddorawl ar gynllun y Parch. D. Silvan Evans'); 'Rheithiadur Llythyraeth a Llafariaeth yr Iaith Gymraeg' ('Dechreuwyd Gorphenaf 26, 1850'); 'Adgofiedydd-Llythyraeth. Tach. 3, 1856'; 'Cyhydedd Geiriau Unsill y Gymraeg. The Quantity of Welsh Monosyllables' ('Argraffedig gan mwyaf, ond nid y cwbl oll, yn "Llythyraeth yr Iaith Gymraeg", Pen. IV (Caerfyrddin, 1861, 16 plyg)'; 'Henafion Cymreig - Geiriadur o Henafiaethau Cymreig'; 'Allan o "Gynghorion Priodor o Garedigion i Ddeiliaid ei Dyddynod" (Llundain, 1800, 8 plyg)' (a glossary based on the Welsh translation of Thomas Johnes, A Cardiganshire Landlord's Advice to his Tenants); 'Welsh Laws' (a glossary); etc.

A notebook in the hand of J. H. Davies, with a few insets, containing an incomplete (A-F) list of first lines of the poetry of Dafydd ap Gwilym; bibliographical data on nineteenth century Welsh almanacs; transcripts from Yny lhyvyr hwnn .... (1546); and an incomplete list of idiomatic and syntactical forms ('Brawddegau Dull-weddau Cymreig') in Ellis Wynne, Gweledigaethau y Bardd Cwsc (Llundain, 1703).