Autumn: From the Journal of Henry David Thoreau (1892) details his observations during walks and outings in and around Concord, Massachusetts, during the fall, sequenced by stage in the season, rather than chronological. You may also be interested in Summer, his journal entries for the preceding season.
Sept. 21, 1854 to Sept. 30, 1858
Nov. 12, 1841 to Nov. 20, 1853
Nov. 20, 1853 to Nov. 30, 1841
Nov. 30, 1851 to Nov. 30, 1859
Dec. 11, 1840 to Dec. 15, 1859
Dec. 16, 1837 to Dec. 20, 1854