| Rhif Cyf Amg | YALE/45-62 |
| Teitl | Further Addenda being papers relating to the Porthdinllaen Harbour Trust and to the mooted railway from Pwllheli |
| Dyddiad | 19th century |
| Deunydd Cysylltiedig | Compare with Yale/34(iv) and Yale/35 |
| Acquisition | This group of papers was received on 4 November 1940 |