Swansea Central Library Microfilm
- NLW Film 948
- Ffeil
A microfilm copy of Swansea Central Library MS A1.57, 'a composite manuscript of fragments of Welsh and Latin Catholic devotions written about 1600 by William David Llewelyn of Llangynidr, Brecknockshire, and another unidentified scribe' (see Geraint Bowen, 'Rhai Defosiynau Resiwsantaidd Cynnar', National Library of Wales Journal, vol VIII, 1963-64, pp 389-96).