- NLW MS 21805C.
- Ffeil
- 1845-1847
Twenty-seven letters, 1845-1847, from the engineer James Watt, jnr, of Aston Hall, Warwickshire, to Robert William Mylne, architect and engineer, relating to the rebuilding for Watt of Doldowlod, parish of Llanyre, Radnorshire, and containing references to the Gloucester and Aberystwyth Railway, the Central Wales Railway and the Welsh Midland Railway (ff. 29-30, 31 verso-32).
Watt, James, 1769-1848