Cambridge, Mass.
1910
Feb. 28 [February 28, 1910]
  At intervals through the day, from 8 A.M.
to 4.30 P.M., and not less than ten or a dozen
times in all, I heard, as I sat writing at my
desk in the Museum, with the window closed,
the shrill clar - clar - clar - clar of a Sparrow Hawk.
The sound came to my ears distinctly, evidently
from a bird flying low overhead, but when I
went out to look for him it usually ceased before 
I left the door. At length I got a good, if rather
brief, view of him as he circled swiftly just above 
the tops of our lindens. After this I repeatedly 
heard him in the direction of Holland Park and
to the west & north of the museum. He seemed
to be making repeated tours of the entire neighborhood
about our place & to be proclaiming his presence
vociferously. I fancy it may have been a love
flight (the bird looked like a male) but why should
he come here for that purpose?
Sparrow
Hawk
flying over
our Garden
at intervals