Concord - Cambridge.
Ther [Thermometer] Tuesday, Aug. 10, 1915 [August 10, 1915] Wea [Weather]
Fine
  For most part clear with light
cool northerly wind. There were,
however, two brief showers in
late P.M. & thunder muttering afar off.
  Song Sparrows & Indigo bird in full
song several times during day. Robins
sang only a little & then but feebly.
Saw one feeding young in nest in
locust front of house. This, without
much doubt, must be the same bird
who reared her first brood this year in
nest built in wood pile in our shed.
[male] House Wren sang once or twice. Saw
his mate carrying food into box on pole
& heard young chattering inside. This
pair were feeding their first brood in
another & nearby box the last of June.
  Spent forenoon working with
Burbank & George. We weeded flower
beds front & rear of house & moved
a number of Zinnias & Asters.
  Gilbert [Robert A. Gilbert] & I left Farm at 4.07 P.M.
Just after reaching home at 5.15 I looked
skywards to see a Great Blue Heron flying
S.W. [southwest] at immense height.
  Dined with the Cobb-Fullers at 6.30.

Cambridge.
Ther [Thermometer] Wednesday, Aug. 11, 1915 [August 11, 1915] 11, 1915 Wea [Weather]
Fossil (?) bird's nest Fine
Clear with light westerly wind
and perfectly comfortable temperature
without obvious humidity.
  In Garden: An adult Robin on lawn;
a silent Jay stealing through Jungle;
a Red-eyed Vireo singing sotto voce
- scarce louder than a Singing Mouse &
not otherwise unlike one - in rum
cherry tree by Museum gate; a few
House Sparrows, mostly on lawn; about
25 [in a flock] Swifts flying at immense height
certainly not less than 300 yards - not
in any particular direction but hither &
thither as if feeding, keeping mostly in
sight for half an hour (4-4.30 P.M.).
  Sam Henshaw telephoned at 9 A.M., asking
me to come to Mus. Comp. Zool. [Museum of Comparative Zoology] to see a 
supposed fossil nest & eggs. I walked down
at noon & studied these specimens with
some care. If natural fossils, originating where
found in So. Boston [South Boston] shed, they may once have
belonged to a Phoebee [Phoebe]. Robert Jackson thinks they
may have come from Italy where such things
are manufactured & sold, he says. I cannot
help suspecting some such origin.
  Spent remainder of day in Museum writing
letters. Took all three meals alone on back piazza.
Call from book maker desiring date about father.
[margin]Percy Harris saw a Hummer (wh. thr'd) [White-throated Hummingbird] at bee balm at 4.30 P.M.[/margin]