| Rhif Cyf Amg | PFA/14/1100 |
| Teitl | Private work account book |
| Disgrifiad | This book contains the details of companies who have worked on various buildings in Penrhyn estate between 1917- 1955. Details include the company, the materials used, date of payment from the estate office. The book also contains a handwritten index and 4 invoices for various works that have been inserted loosely into the book. |
| Dyddiad | 05 November 1917- 01 January 1955 |
| Extent | 1 hardback book, 4 loose pages of invoices slotted into the book in various places |