William Thomas (Llanrwst) Papers,
- William Thomas (Llanrwst) Papers
- Is-is-is-fonds
- 1865-1925.
William Thomas (Llanrwst) Papers,
William Thomas ('Islwyn') Papers,
William Powell (Pembroke) Papers,
W. Nantlais Williams ('Nantlais') papers,
W. H. Williams, Prestatyn, Papers,
Trevecka letters, manuscripts and records (Group I),
For a complete calendar of the Trevecka letters and manuscripts see Boyd Stanley Schlenther and Eryn Mant White, Calendar of the Trevecka Letters (Aberystwyth, 2003). Some were also published in the CM Historical Journal.
Trefeca College manuscripts and records (Group II),
Thomas Hughes, Machynlleth, Papers,
Thomas Charles Williams Papers,
Sustentation Fund and Pension Fund [Maintenance of the Ministry (Sir David James Fund)],
Sustentation Fund and other miscellaneous papers,
Sermons, notes of sermons, and names of preachers and their texts.
Richard Humphreys, Dyffryn, Papers,