1893 
April 24                                          
Concord, Mass.
     Clear and slightly warm with moderate W. wind.
[margin]Ball's Hill[margin]
     I spent the night in the cabin. The wind died
away wholly at about 8 P.M. and the sky cleared. There
was a singing chorus of Hylas with a few Wood Frogs
up to the time I went to sleep (10 P.M.) and an hour
or two later I awoke and heard them still piping & croaking
but still later (probably 2 or 3 A.M) I awoke again & 
found that they had become wholly silent. This was probably 
due to a fall in the temperature for at sunrise this
morning there was a heavy white frost.
[margin]Birds singing at sunrise[margin]
    Soon after sunrise I dressed and climbed to the top 
of Ball's Hill. Robins, Red-wings, Song Sparrows and a 
Flicker were singing by the river, on the hill a Pine Warbler.
No Doves seen or heard. A large flock of Yellow Palm Warblers
(at least a dozen) with a few Yellow-rumps & two [male]
[Ruby-crowned Kinglets] came drifting along the hillside flitting
from bush to bush and hopping on the ground in little
groups like Sparrows. All of these species sang freely & often all
three were singing at once. Then a Chickadee joined in with
his ti-dee.
    Shortly after breakfast I saw an Osprey rise to a 
great height and soar in circles for nearly ten minutes
without once flapping his wings. The wings looked very 
narrow and were held almost perfectly level.
[margin]Osprey[margin]