80
Concord, Mass.
1898.
May 6
  Clear and cool with light N. wind.
  Spent the forenoon near the cabin. No increase in number
of birds, either of species or individuals as compared with yesterday
save that two Brown Thrashers were heard signing, the one on 
the shore opposite the cabin and a fresh bird opposite Davis'
Hill.
  At 6.30 A.M. Gilbert called my attention to a flock
of four Herring Gulls which were passing high over Ball's Hill
towards the N., apparently migrating. Mr. Edward Bartlett
afterwards told me that he saw them pass his house
at Concord at about the same time.
  Went to Cambridge by the noon train. Found a Yellow
Warbler & a Hermit Thrush in the garden. W. Deane says
that the former appeared on the 2nd and has been singing
every day since. 
  Returned to Concord by the 5.30 P.M. train. During
my absence the shad bushes along the south side
of Ball's Hill had burst into full bloom and many
of the birches & maples had become quite green with
unfolding leaves. 
  At sunset a Bittern was pumping at short intervals
in the bushy part of the swamp behind Ball's Hill. 
I thought I heard one [of] the on the night of the 2nd.