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[1] See Henry D. Thoreau's "Walden"; "A Week on the Concord and Merrimack Rivers"; "Winter"; etc.

[2] See John Burroughs, his "Birds and Poets"; "Locusts and Wild Honey"; "Pepacton"; "Signs and Seasons"; "Wake Robin"; "Winter Sunshine"; etc.

[3] See Richard Jefferies, his "Amateur Poaching"; "Field and Hedgerow"; "Wild Life in a Southern County"; "Nature near London"; "Round about a Great Estate"; "Wood Magic"; "The Story of my Heart."

[4] See Hamilton Wright Mabie's "In the Forest of Arden"; "Under the Trees and Elsewhere"; etc.