BOOK I PART IV
perience, unless the door, which I remember
on the other side the chamber, be still in be-
ing. Again, I have always found, that a human
body was possest of a quality, which I call grav-
ity, and which hinders it from mounting in the
air, as this porter must have done to arrive at
my chamber, unless the stairs I remember be
not annihilated by my absence. But this is not
all. I receive a letter, which upon, opening it
I perceive by the hand-writing and subscrip-
tion to have come from a friend, who says he
is two hundred leagues distant. It is evident I
can never account for this phenomenon, con-
formable to my experience in other instances,
without spreading out in my mind the whole
sea and continent between us, and supposing
the effects and continued existence of posts and
ferries, according to my Memory and obser-
vation. To consider these phaenomena of the