1893. 
May 30     
Concord, Mass.                                                                                                               
Cloudless; dead calm and very warm up to 10 a.m.; rather chilly                                           
E. wind from 10 a.m. to 2 p.m.; strong, cold S. wind the
remainder of the afternoon changing to S.W. after dark.
  To Ball's Hill by canoe at 9 a.m. Spent most
of the forenoon working along the shore of the Blakemore
land trimming & cutting out trees. In the afternoon
walked to Holden's Hill where I spent an hour or more.
Birds sang freely in the morning before the wind rose
but afterwards there was but little singing even at sunset
when, however, I heard Robins, Maryland Yellow-throats,
a Mniotilta, a Redstart etc.
[margin]Ball's Hill[/margin]
  The Brown Thrashers were singing vigorously this
morning. I heard two on the way down river and
every bird near the cabin was in full song when I
landed the only time he has favored me in this way
for a week or more.
  I could find no Water Thrushes to-day and the                                                     
only northern migrants noted were a Black poll in
full song and a silent Olive backed Thrush, both in
the belt of bushes along the river at the base of Ball's Hill.
[margin]Northern birds
nearly all 
gone.[/margin]
  For a week or more a Yellow-throated vireo has sung                                         
in the early morning and at intervals through the
day in the elms in front of the house. He seems to
spend practically his entire time in these trees. Indeed
I do not remember over hearing him elsewhere in
the neighborhood, even in the orchard. This morning
[margin]Yellow throated
Vireo's nest[/margin]