'Welsh Tunes sent [by John Jenkins] to Mr. [John] Parry January 28th 1826 and the words adapted to them; with some observations on both'; a list, by John Jenkins, of 'Welsh Tunes wanted to which appropriate Words are found'; and 'Remarks on certain Welsh Tunes which are to be transcribed into ... " Melus Seiniau Cymru"....'
A catalogue of the books in the library at Crosswood, made by John Jenkins, 1824, with earlier catalogues, also possibly of the Crosswood library, made in 1784 and 1788.
'The Mabus Manuscript containing the Pedigrees of the Gentry of Carmarthenshire, Cardiganshire and Pembrokeshire .... carefully transcribed from the Copy of David Rowlands Esqr. of Chatham by J[ohn] J[enkins] Kerry, 1829'. The transcript was completed in 1830 by D. Davies, junior.
A copy, which belonged to John Jenkins, of John Rippon : A Selection of Psalm and Hymn-Tunes ... adapted principally to Dr. Watt's Hymns and Psalms, and to Dr. Rippon's Selection of Hymns ... 4th ed. (London, [1800?]).
'Per-seiniau Cymru', a collection by John Jenkins, [1824]-[1825] (watermarks 1814, 1820), of Welsh tunes 'cyfaddas i Destunau difrifol' ('suitable for serious subjects') (f. 1). The volume contains 101 tunes, 52 of which are copied from Melus-seiniau Cymru (NLW MS 1940iA). Nos 1-47 (ff. 3-48) and No. 56 (ff. 56 verso-57) have the Welsh lyrics added. A list of contents is on ff. 1 verso-2 verso.
Pedigrees, mostly copied 1828, in the hand of John Jenkins, of the families of Herbert of Dolforgan, Kerry, Jones of Great Hemm, Forden, and Pryce of Gunley, and of Hugh Owen, archdeacon of Salop (ff. 7-17 verso); with coloured drawings of the arms of the founders of Welsh families, etc. (ff. 199-208, 215 verso-217, 221 verso).
Transcripts by John Jenkins of vocal and instrumental music, sacred and secular, with English words added in some instances, and a letter, 1808, to John Jenkins from David Lloyd, Llanbister.
'Melus-seiniau Cymru', a collection by John Jenkins, [1817]-[1820], with additions to about 1825 (watermarks 1805, 1813 in the fly-leaves), of Welsh tunes, most with the Welsh lyrics added. The volume is divided into several sections, consisting of 60 psalms and hymns (ff. 2-26, 151-178), 40 hymn-tunes (ff. 28-48), 58 elegies, carols and moral songs (ff. 50-96) and 67 songs on various themes including military and romance (ff. 100-149, 179-190).
Transcripts by John Jenkins and others of poetry in free metre by John Evans (Llanfihangel Ystrad), John Howell, Jonathan Hughes, John Edwards (Clochydd Manafon), R. Jones, David Ellis, and Peter Jones (Pedr Fardd).
'Helps towards a more copious Cambrian Biography' containing 'A List [the surnames alphabetically arranged] of Welshmen who attained the Episcopal Dignity, from the year 1558 ... to 1714'. At the beginning is an extract from a letter, dated October 7, 1825, from John Jenkins ('Ifor Ceri', 1770-1829) to Thomas Beynon, archdeacon of Cardigan.
A copy, which belonged to John Jenkins, of Owen Williams (o Fôn) : Brenhinol Ganiadau Sion neu Gynghanedd Newydd Gymraeg Yn Cynnwys Hen Beroriaethau Brytanaidd a Rhai Diweddar Heb eu Hargraphu o'r blaen (London, [c. 1820]).