a post and fair town of Ireland, pleasantly situate on the River Liffey, in the county of Kildare, about ten miles from Dublin. Near it are the ruins of the church and castle of Cony. The castle of Leixlip is beautifully situate on the banks of the Liffey. In the immediate neighbourhood is situate the well-known waterfall, called the Salmon Leap, which consists of a succession of rocky ledges, on the Liffey, over which the fish dart at one bound.