"Roscommon, a county of Ireland, province of Connaught, bounded E by Longford and Westmeath, S by Galway, W by Mayo, N by Sligo, and NE by Leitrim, 50 English m. long, and 37 broad. It is a flat open coutry, in some places sprinkled with rocks, in many interrupted by extensive bogs, and but little diversified by hills. The Shannon divides it from Longford and Westmeath, and the Suck from Galway. It has excellent pastures. Pop. 207,777."
[From The New London Gazetteer (1826)]