"Mayo, a county of Ireland, province of Connaught, 62 m. long and
52 broad, bounded E by Roscommon, S by Galway, W and N by the Atlantic,
and NE by Sligo,containing 796,000 acres, divided into 68 parishes. The
W coast is mountainous, and thinly inhabited; but the interior produces
excellent pasturage, and is watered by several lakes and rivers. Pop. 297,538.
Chief town, Castlebar."