Letters, 1896, from John D. Evans, Talley, Llandilo to Thomas Levi and from E. Wynne Parry, Bala and Richard Jones, Oswestry to Owen Jones relating to Welsh hymns and hymn-writers; transcripts of hymns by Morgan Rhys and William Williams, Pantycelyn and of a portion of Daniel Williams: Gwagedd Mebyd a Ieuengctid ... At yr hyn y chwanegir, Catechism i rai ieuaingc (Llundain, 1739); etc.

A biographical dictionary of Welsh hymn-writers submitted by 'Ioan o'r Aber' for competition at the Aberystwyth Chair Eisteddfod, 1904.