Derg
LOUGH, the largest lake expansion of the river Shannon, between Tipperary and Galway and Clare, in Ireland; is 24 miles long, with an average width of two miles; greatest depth, 80 feet. Its surface is about 100 feet above the sea. Another Lough Derg, in the S. of Donegal co., is 3 miles by 2½, has many small isles and rocks, and wild, dreary shores. Saint's Isle contains the remains of a priory. Station Island, the reputed entrance to St. Patrick's Purgatory, was long the most celebrated place of pilgrimage in Ireland.