| Ref No | SWCC/MND/22 |
| Title | Material relating to Onllwyn no. 1 Colliery and Lieutenant Howell Jeffreys |
| Description | Onllwyn no 1 Colliery overman's measuring book (1908), and letter from Glamorgan County Council Education Department to Lieutenant Howell Jeffreys re interview for post of mining lecturer (1919). |
| Date | 1908-1919 |
| Subject | Coal mines and mining--Wales, South; |
| Related Material | GB 217 SWCC : MNA/NUM/L/61 Title: Onllwyn No. 1 Lodge A copy of this description is held on the Archives Hub. |
| Person_Code | ANW/CORP/5149 |
| ANW/CORP/5148 |
| ANW/PERS/3057 |
| Place_Code | ANW/PLACE/1724 |
| Extent | 2 items |
| AccessConditions | Access unrestricted unless stated otherwise. |