A black swallowtail butterfly at Maya Lin’s “Storm King Wavefield”; Lewis Mumford’s essay, “Quality in the Control of Quantity,” in Natural Resources: Quality and Quantity; Johann Wolfgang von Goethe’s “Der Zauberlehrling”; Dragon Langerie beans.

John Lindmark’s bookstore in Poughkeepsie; Hidden History of the Lower Hudson Valley by Carney and Tatiana Rhinevault; Fahrenheit 451 by Ray Bradbury; A Short History of the Shadow by Charles Wright.

Metro North along the Hudson; Raymond Carver’s “Cathedral”; Jorge Luis Borges’s “El libro de arena” (“The Book of Sand”).

Pollepel Island; Thom Johnson’s and Barbara H. Gottlock’s Bannerman Castle; Lewis Carroll’s Alice’s Adventures in Wonderland; H.C. Engelbrecht’s and F.C. Henighen’s Merchants of Death: A Study of the International Arms Industry; George Bernard Shaw’s Major Barbara; Matthew Coolidge’s Up River: Man-Made Sites of Interest on the Hudson from the Battery to Troy; Shaun O’Boyle’s Modern Ruins: Portraits of Place in the Mid-Atlantic Region; Alexis de Tocqueville’s Democracy in America.

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.