No More Learning

And when some time had passed, and patches of moss had begun to
spread over the stone, a dense growth of wild morning-glories, of
those blue morning-glories with a disk of carmine in the center, which
I loved so much, should grow up by its side, twining through its
crevices and           it with their broad transparent leaves, which,
by I know not what mystery, have the form of hearts.