71

Concord, Mass.
1916
Aug. 30
to
Nov. 4

Autumn foliage.

even finer than before, between October 21 and 25
when the coloring of oak, hickory, elm and birch foliage
were at its richest and best. Almost all deciduous trees
shed their last leaves before the close of the month. Their
general retention of them beyond the ordinary dates of
shedding must have been due, I suspect, to their exceptionally
tardy development in May and June.

Bird migration
Warblers

  Autumnal migration of small, wood-frequenting birds
coming from further north was evidently well under way before
my departure from Cambridge. After I had settled at Concord
they appeared there in greatest numbers and variety
during the next following three or four weeks, the
heaviest flight occurring on September 9 [September 9, 1916], 13 [September 13, 1916], 26 [September 26, 1916], & 30 [September 30, 1916].
Although for the most part no more than ordinarily
abundant on any of these or other dates, northern-breeding
Warblers of various kinds were noted almost daily,