The file consists of letters from John White to his father-in-law Dr Thomas Jones CH containing mainly professional news - journalism, printing and publishing. This is interspersed with occasional references to personal and family events. There is also a single stray letter, 5 April 1951, from Thomas Jones to John White.

Miscellaneous notes and papers of Iolo Morganwg, [18 cent., last ¼]-[1830s], on a variety of subjects, including (mainly Welsh) history (E8/1), religion (E8/2), Welsh and English literature, including Dr Johnson (E8/3), Bardism (E8/4) and biography and genealogy (E8/5); together with further bundles of miscellaneous notes and papers, retained in original order (E8/6-9), with subjects including politics, printing and Poems Lyric and Pastoral, 1784-[c. 1809] (E8/6), patriarchal religion, priestcraft and Lewis Morris (E8/7), poetry and monumental inscriptions (E8/8) and salmau (E8/9); and a case containing notes on Welsh manuscripts in the British Museum and at Jesus College, Oxford (E8/10).