FROST, ROBERT. North of Boston. London, [1914]. FIRST EDITION. Signed by Frost on title -- Mountain Interval. New York, [1916]. FIRST EDITION, second state. Signed by Frost on front free endpaper -- Selected Poems. New York, 1923. Dust jacket. Together 3 vols., 4to and 8vo, all original cloth, condition varies, generally good. (3)