FROST, ROBERT. Mountain Interval. New York: Holt, [1916]. 8vo, original blue cloth, uncut, slight wear at ends of spine, rear cover a trifle stained. FIRST EDITION, FIRST STATE, INSCRIBED BY FROST with the 8-line poem "Dust of Snow" written out and signed by him on the front free endpaper. The poem first appeared in New Hampshire (1923). Crane A4. Bookplate of Charles C. Auchincloss. Contains the first appearance of "The Road Not Taken" in a Frost book.