Cambridge, Mass.
1910.
Feb. 14 [February 14, 1910]
(No 2)
was really the case for they did not seem to be
obtaining anything in the way of food. After they had
done really serious damage to the trees (one of which is
a sound and valuable seckel pear the other an old & nearly 
worthless tree) I protected the trunks from further injury
by wrapping them in burlap. A few days after this
I heard the sound of intermittent tapping above my 
study in the Museum & every now and then a lump 
of mortar fell into the fireplace from above. I think this
happened first on the 12th and am certain it happened
yesterday (13th). To-day it began again and I at
once went out taking my opera glass. As soon as
got a clear view of the Museum chimney I perceived
a [male] Flicker clinging to its eastern face about 5 ft.
below the top, busily engaged in digging
out the mortar between the bricks. He would work
Flickers
barking
pear trees