1891
April 6
No 2 
  Mass.
  Concord.- The view over the flooded meadows was
very attractive the great expanse of water with its
bordering woods and isolated clusters of trees
resembling perfectly some natural lakes dotted
with small wooded islands. Bolles found a
large new-looking nest in a tall pine under
which we found pellets apparently of a large
Owl. In a sandy field we found a large number
of cylindrical, elongated masses of closely-felted
mouse fur intermixed with fragments of skulls
and bones. At first we thought they must be
Owl pellets but close examination satisfied us that
they were really faeces, doubtless of Foxes. We
found others composed of rabbit fur & bones in
a wood path lower down river.
  The spreading oak at the Ball's Hill landing
has been cut down the past winter. We counted
the rings Bolles making 129 on one side. I 119
on the other. I had no idea this tree was so 
old for it was not large and looked young
and vigorous.
  Just below Ball's Hill we heard a great rustling
in the dry leaves in a thicket bounded on one
side by the water, on the other by a stone wall.
The noise was fully as loud as a partridge
or Woodchuck would have made but it was
caused by Fox Sparrows, a dozen or more of
which whirred up into the bushes when they
saw our boat.
  As we approached the hills below Ball's Hill
a pair of Red-shouldered Hawks began