Concord, Mass.
(Ball's Hill)
1900
April 23
(No.2)
  At about 9 P.M. as we were sitting in the
cabin reading I heard a Great Horned Owl hooting.
The window & door were closed and the sound 
seemed to come through the logs at the back of
the room & perfectly distinctly though rather faintly.
When we stepped outside it became evident at once
that the bird was in the cluster of tall pines
at the east end of Ball's Hill within about 100 yds.
of the cabin. He continued to hoot at short intervals
& without changing his position for fifteen or 
twenty minutes giving always five notes, hoo, hoo-hoo,
hoo, hoo. The night was foggy, cloudy and
intensely dark. It is unusual, according to my
experience, for an Owl of any kind to hoot
so persistently under such conditions. I hope he
did not catch our pet Rabbit.
Hooting of 
G. Horned Owl 