Notebooks containing the manuscript versions of the poems which appeared in his published collections, including a typescript copy and a proof copy of Sonedau a Thelynegion.
Also, a collection of manuscript poetry, newspaper cuttings, articles, letters and a photograph relating to William Jones, compiled most probably by Rev. E. Wynn Jones of Holyhead or his wife. The majority of the poems have been composed and written by William Jones although a few are in the hand of Mrs. E. Wynn Jones. Amongst the other poets are, T. H. Parry-Williams, Walter Pater, I. E. Flecker, and James Evans.