 The constituency was created by the Redistribution of Seats Act 1885 for the 1885 general election, and abolished for the 1918 general election.Throughout its existence it was held by the Liberal Party and it was a constituency largely dominated by the coal mining industry.Created in the redistribution of seats in 1885 & from the old Glamorganshire constituency which had been in existence since 1541, the seat covered a wide area that included Llantwit Fardre, Church Village, Tonteg, Pentyrch, Creigiau, Pontypridd, Caerphilly, Abercynon, Llanfabon, Gelligaer, Hengoed.