MONKNEWTOWN, a parish, in the barony of UPPER-SLANE, county of MEATH, and province of LEINSTER, 2½ miles (E. by N.) from Slane, on the road to Drogheda; containing 700 inhabitants. It is bounded on the south by the river Boyne, and on the north-east it is separated by the Mattock from the parish of Tulloghallen, in the county of Louth, of which, in the ecclesiastical divisions, it is considered to form a part. The land is in general of excellent quality, and is nearly equally divided between tillage and pasture; the pasture land in the vicinity of New Grange, the residence of R. Maguire, Esq., is of the very best description. On the river Mattock is an extensive flour-mill, partly propelled by steam; and the canal from Drogheda to Navan passes through the southern part of the parish. In the R, C. divisions it forms part of the union or district of Grangegeeth: the chapel, a neat structure, is near the ruins of the ancient church. About 30 children are educated in a private school. At New Grange is a remarkable vestige of antiquity, consisting of a mound surrounded by a circle of upright stones, and in which is a vaulted cave in the form of a cross: it is fully described in the article on Slane.