BALLYHAISE, a market-town and post-town, in the parish of CASTLETERRA, barony of UPPER-LOTJGHTEE, county of CAVAN, and province of ULSTER, 3½ miles (N. W.) from Cavan, and 59 miles (N, W.) from Dublin, on the road from Cavan to Cootehill; containing 142 houses and 761 inhabitants. Ballyhaise House, the seat of W. Humphreys, Esq., is a spacious mansion, with an elevated front curiously ornamented with arches. The linen trade was formerly carried on here to a very considerable extent, but is now extinct. There is a tanyard, employing 7 or 8 persons; and near the town are some extensive flour and oatmeal-mills. The market is on Saturday; and fairs are held on the 1st of March, April 11th, May 18th, June 20th July 3th, Aug. 30th, Oct. 3rd, Nov. 6th, and Dec. 13th, chiefly for horses, cattle, and pigs. The market-house is an arched edifice built of brick, and of singular appearance. Here is a station of the constabulary police. The parochial church, a remarkably neat edifice in excellent repair, is situated just without the town; and there is also a R. C. chapel.- See CASTLETERRA.