Cambridge,Mass.
1910
Feb. 6 [February 6, 1910]
(No 3)
began to respond to his vigorous and rapid masculine 
thrusts with reciprocal movements and at length, apparently
excited beyond control, by passion, race up the trunk for 
a distance of a yard or two and then stopping abruptly
let go the hold of her hind feet. During the next few
seconds which, I think, probably masked the period
when the final, supreme orgasms were taking place and
the seminal fluid was discharged, the bodies of the
two Squirrels were so closely welded together that they 
looked like one animal of abnormally elongated shape
for the head of the male was flattened on the back
of the female about at her shoulders and their only 
points of mutual attachment to the tree trunk were
afforded by the fore paws of the female above &
by the hind feet of the male below. The latter fact
was unmistakable for during the period to which
Gray
Squirrels
copulating.