Spring in the Valley; the Bear Mountain Bridge; Princess Shikishi’s “Spring”; Benton MacKaye’s The New Exploration; Tony Hiss’s The Experience of Place; Larry Anderson’s Benton MacKaye.

Invasive species; T.C. Boyle’s World’s End (the Hudson’s deepest point); Edwin Manning Ruttenber’s History of the Indian Tribes of Hudson’s River; Percy Bysshe Shelley’s “Ozymandias”; Water Caltrops.

Utopian communities: Dolores Hayden’s Seven American Utopias; Spencer Klaw’s Without Sin; Gar Alperovitz’s What Then Must We Do?; Horizon magazine; the Book of Mormon.

Pelton Pond; the Civilian Conservation Corps and Forrest W. Gaz’s “Taps”; conic sections.

Ice on the Muhheakantuck – the “River that Flows Two Ways”; the New York Times on “Beating the Lightning Train.”

Visiting Clarence Fahnestock State Park; Robert Frost’s “The Ovenbird.”