- NLW ex 1710.
- File
Photocopies of articles concerning The Celtic Collieries, Ltd, and North's Navigation Collieries (1889), Ltd, and of articles by Arthur John Flint and Leonard S. Higgins which appeared in Glamorgan Historian, vols 10 and 11, and D. R. L. Jones which appeared in Morgannwg, vol. 34, 1990; together with a typescript copy (3 pp.) of 'Tondu. A Local History' by Selwyn Baker.