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The River Blackwater (Irish: Abhainn Dubh) rises in the Cuilcagh Mountains, in the townland of Gowlan, Parish of Killinagh, Barony of Tullyhaw, County Cavan. It then flows in a south-east direction and ends in Ballymagauran Lough.[1] It has a fish population of brown trout, pike and perch.[2] The earliest mention of the river is in poems in the Book of Magauran dating to the 1350s.[1]
- ^ L. McKenna, ed., tr. (1947), "The Book of Magauran"