Concord, Mass.
1910
April 17 [April 17, 1910]
  Brilliantly clear and bracingly cool with strong,
keen East wind.
  The marsh on the south side of the river
directly opposite Ball's Hill looks, at present, almost
as smooth and verdant as a well-kept lawn.
It was all mown over late last summer and having
been free from flood water for upwards of a month
past, is now covered everywhere with young
grass three or four inches in height. Although this
affords no cover for birds much larger than a 
Snipe the marsh has been frequented much of late
by Bitterns. At morning and evening I have
heard them pumping there or have seen them flying to
and fro or standing erect with heads and necks
stretched up on the watch for danger but previous 
to to-day have paid little attention to them.
Remarkable behavior of American Bitterns