Cambridge, Mass. 
1906.
July 16
  Although I have been absent from Cambridge during
most of the spring and early summer I have abundant
evidence to show that no Robins roosted on our place during
April, May or June. On several occasions in June I saw
our breeding birds (at least the two males) fly off towards the
westward just before dark. Mrs. Brewster who was here
during the greater part of June assures me that no Robins
came to the lilacs at evening during that month nor during
July 1st and 2nd, as she took tea every evening on the
back piazza her testimony to this effect is conclusive.
The Robin roost in our garden broken up & shifted to the lindens
  By a curious coincidence the birds returned to the old
roost the first evening after my return: - that of July 3rd
when I saw about 15 Robins enter the lilacs about 8 P.M.
The next evening they came in much larger numbers and
I watched them until they had become settled on their
perches and quite silent. On this occasion I counted 52
incoming birds. After this they came every evening for a while
but in smaller and very variable numbers. I made
no more counts but noted "about" 20 birds on the 9th
and about 30 on the 13th. These were the largest numbers.
On several evenings less than a dozen came but there
were always at least a few up to and including the
evening of the 13th. On that evening we had tea &
a dozen people to tea on the back piazza which was 
brilliantly lighted. The noise, bustle & lights seemed to
disturb the birds a good deal and once when it was
nearly dark they all started off in a body but most
of them quickly returned & I think they all spent the
night in the lilacs. We have not seen any of them
there since but the place has not been closely watched &
it is possible that a few birds came to this roost during