Concord, Mass.
1901.
April 1
  Cloudy most of the day with strong, cool N. wind.
  Gilbert and I came to Ball's Hill last evening crossing the 
river at about sunset. It was cloudy with a violent &
piercingly cold N. wind which brought occasional flurries of snow.
We saw a flock of 5 Tree Sparrows by the railroad embankment
and a solitary Black Duck flying over Ball's Hill as twilight
was falling.
  At sunrise this morning the sky was cloudy and a
harsh wind was blowing. No birds singing excepting a few
Redwings. As the forenoon advanced the sun showed itself
for brief intervals and the temperature rose steadily. The 
afternoon was windy but not at all cold.
  At about 11 A.M. as I was on the West Bedford Shore
I heard a Fish Hawk whistling. Looking up I saw the
bird soaring high over Great Meadow in company with a 
Red-tailed Hawk. For several minutes they circled together
the Red-tail slightly above the Fish Hawk, both rising
higher and higher and drifting off towards the South
  The contrast in respect to the shape and set of their
wings was interesting and the ease & grace with which
they slowly and smoothly swung around and around
were most admirable.
  Another fine large bird, a Herring Gull, swept majestically
past Ball's Hill many times during the forenoon.
  In the afternoon I went to the farm paddling down
past Davis's Hill and landing just below it. As I
was entering the wood road at Prescott's pines I
happened to look back and caught just a glympse
at a Marsh Hawk that was heading for Birch Island.
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