The subdivision of the county into townships was made by an act of the legislature passed March 7, 1788. By this important statute twenty-one " towns " were erected, as follows: Westchester, Morris ania, Yonkers, Greenburgh. Mount Pleasant, Eastchester, Pelham, Now Rochelle, Scarsdale, Mamaroneck, White Plains, Harrison, Rye, North Castle, Bedford, Poundridge, Salem. North Salem, Cortlandt, Yorktown, and Stephentown. The Town of Westchester included all of the original Westchester and West Farms tracts, with Fordhain Manor. The Town of Morrisania coincided with the old Morrisania Manor. But the existence of Morrisania as a separate town was speedily brought to an end.1 By an act passed February 22, 1791, it was annexed to the Town of Westchester, from which it was not again severed until 1855 (December 7(. The three Towns of Yonkers, Greenburgh, and Mount Pleasant were created out of the Manor of Philipseburgh. The original bounds of ^ onkers were the same as at present, except that the southern portion of it has recently been annexed to the City of New York. Greenburgh lias always retained the limits fixed tor it by the act of 1788. Its northern boundary, as described in that measure, was "a line beginning on the east side of Hudson's River at the southwest corner of the land lately conveyed by the commissioners of forfeiture for the southern district to Gerard G. Beekman, Jr., and running from thence along the southerly and easterly bounds thereof to the farm of William David, and then along the southerly and easterly