The Hudson Highlands, Source of the Croton — Harper's (1860) Engraving showing the Hudson Highlands near the source of the Croton River. From Harper's, December 1860. The Croton River rises in Putnam County and flows through the highlands before reaching the dam at Croton-on-Hudson. Date: December 1860 Type: engraving Subjects: Hudson Highlands, river, boats, mountains Text visible in image: THE…