- Peniarth MS 433 [RESTRICTED ACCESS].
- Ffeil
- [17 cent.].
Notes and transcripts of tracts on logic, shells and 'physica universalis'.
Notes and transcripts of tracts on logic, shells and 'physica universalis'.
Notes on shells and an address on the subject given by D[avid] Harris Williams to the members of the Dyserth and District Field Club, 19 March 1917.
A classified and illustrated list by Thomas Pennant of fossils and fossil shells, with lists and notes sent to him by British and continental correspondents.
Thomas Pennant.