| Description | Vertical sections of the South Wales Coalfield covering Swansea and Neath District, Tondu, Ogmore Fuch, Monmouthshire Pen-y-Fan and the Forest of Dean (1908), Plan of Great Western Colliery Company Limited Maritime Pit 4 foot Seam by Gwilym Jenkins (15.03.1927), certificate for the election of membership of Gwilym Jenkins to the Institution of Mining Engineers (seal attached) (1937), diagram entitled "Improved King's Detaching Hook"[c1937?], Final Arrangements, Tower and Fernhill Colliery Ventilation Plan (1980), plan of [workings] at Tower and Fernhill Colliery [c1980], lodge income and expenditure book [Fernhill Colliery] (1954-1979), inspection of 432 Conveyor District No 4 Pit, Fernhill Colliery (15.01.1960) and an inspection of 432 Conveyor Face and North Gate, Fernhill Colliery (4-6.12.1959). |