sleeping."

"True; and who should know better than a physician so well read as
yourself that a spectral illusion once beheld is always apt to return
again in the same form? Thus, Goethe was long haunted by one image,--the
phantom of a flower unfolding itself, and developing new flowers.(6)
Thus, one of our most distinguished philosophers tells us of a lady
known to himself, who would see her husband, hear him move and speak,
when he was not even in the house.(7) But instances of the facility with
which phantasms, once admitted, repeat themselves to the senses, are
numberless. Many are recorded by Hibbert and Abercrombie, and
every physician in extensive practice can add largely, from his own
experience, to the list. Intense self-concentration is, in itself, a
mighty magician. The magicians of the East inculcate the necessity
of fast, solitude, and meditation for the due development of their
imaginary powers. And I have no doubt with effect; because fast,
solitude, and meditation--in other words, thought or fancy intensely
concentred--will both raise apparitions and produce the invoker's belief
in them. Spinello, striving to conceive the image of Lucifer for his
picture of the Fallen Angels, was at last actually haunted by the Shadow
of the Fiend. Newton himself has been subjected to a phantom, though
to him, Son of Light, the spectre presented was that of the sun! You
remember the account that Newton gives to Locke of this visionary
appearance. He says that 'though he had looked at the sun with his
right eye only, and not with the left, yet his fancy began to make an
impression upon his left eye as well as his right; for if he shut his
right and looked upon the clouds, or a book, or any bright object with
his left eye, he could see the sun almost as plain as with the right, if
he did but intend his fancy a little while on it;' nay, 'for some months
after, as often as he began to meditate on the phenomena, the spectrum
of the sun began to return, even though he lay in bed at midnight, with
his curtains drawn!' Seeing, then, how any vivid impression once made
will recur, what wonder that you should behold in your prison the
Shining Shadow that had first startled you in a wizard's chamber when
poring over the records of a murdered visionary? The more minutely
you analyze your own hallucinations--pardon me the word--the more they
assume the usual characteristics of a dream; contradictory, illogical,
even in the marvels the