- NLW MS 23397A.
- Ffeil
- 1873-1874 /
A fragment of Letts's Diary, No. 13, 1873, mainly used by John Thomas to record his stay in St. Petersburg, December 1873-March 1874, and including references to concert arrangements and to meetings with the Duke of Edinburgh and with members of the Russian royal family and aristocracy.
John Thomas (Pencerdd Gwalia)