Trevecka letters, manuscripts and records (Group I),
- Trevecka letters, manuscripts and records (Group I)
- Sub-sub-sub-fonds
- 1697-1968.
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.