| Rhif Cyf Amg | BMSS/40672 |
| Teitl | Plan and section of the Port Penrhyn Branch Railway |
| Disgrifiad | "Paper under the seal of the company [Chester and Holyhead Railway] in the presence of Edward Crooks, Secretary" |
| Dyddiad | Mid 19th century |
| Condition | Document torn in 3 pieces |