This Hollowed-out Ground

A site for a proposed hydroelectric project also was the site of a grim Revolutionary War battle.

An opaque fog lay close to the surface of the Hudson River on the morning of October 5, 1777. The awakening bugles of General Israel Putnam’s Continentals at Peekskill on the eastern shore of the river seemed muted by the white and misty blanket. The slow-rising sun burned irregular holes in it, however, and through these the General’s sentinels, who had been posted south of his encampment during most of the summer, saw something that banished their accustomed boredom.