This very detailed map covers a fascinating part of the Rhondda valley, including the busy villages of Porth and Cymmer. Coverage extends from Llwyncelyn westward towards Graig-ddu, and SW to Trebanog and Edmondstown. The many features include Mynydd y Cymmer, Cymmer colliery, Taff Vale Railway with station, Glynfach colliery (disused), tramways, St John's church, chapels, Rhondda River, Upper Cymmer colliery, rescue training station, streets of terraces with each house neatly shown, and much else. We include directories of Porth and Cymmer on the reverse.