"Sligo, a county of Ireland, province of Connaught, bounded E by Leitrim, S by Roscommon, SW and W by Mayo, and N by the bay of Donegal, 39 1/2 English m. long, and 37 broad. Area, 620 square m. The soil is in general fertile, but rather boggy towards the coast, and in many parts mountainous. Chief rivers, the Sligo, Bonnet, Owenmore, Unshion, Cooloney, Esky, and Moy. Lead, iron, silver, and copper ores have been discovered, and some of the mountains exhibit strong indications of coal. Pop. 127,819."
[From The New London Gazetteer (1826)]