Original: Eventually, the land came into the possession of William Bayard, who originally supported the revolutionary cause, but became a Loyalist Tory after the fall of New York in 1776 when the city and surrounding areas, including the west bank of the re-named Hudson River, were occupied by the British.
Simplified: Bayard, who liked the revolutionary cause, changed to a Loyalist Tory in 1776 after New York ended.