excavation lay at an exceeding
depth below the surface of the earth. No outlet was observed in any
portion of its vast extent, and no torch, or other artificial source of
light was discernible; yet a flood of intense rays rolled throughout,
and bathed the whole in a ghastly and inappropriate splendor.

I have just spoken of that morbid condition of the auditory nerve which
rendered all music intolerable to the sufferer, with the exception of
certain effects of stringed instruments. It was, perhaps, the narrow
limits to which he thus confined himself upon the guitar, which gave
birth, in great measure, to the fantastic character of his performances.
But the fervid _facility_ of his _impromptus_ could not be so accounted
for. They must have been, and were, in the notes, as well as in the
words of his wild fantasias (for he not unfrequently accompanied himself
with rhymed verbal improvisations), the result of that intense mental
collectedness and concentration to which I have previously alluded
as observable only in particular moments of the highest artificial
excitement. The words of one of these rhapsodies I have easily
remembered. I was, perhaps, the more forcibly impressed with it, as
he gave it, because, in the under or mystic current of its meaning, I
fancied that I perceived, and for the first time, a full consciousness
on the part of Usher, of the tottering of his lofty reason upon her
throne. The verses, which were entitled "The Haunted Palace," ran very
nearly, if not accurately, thus:

I.
In the greenest of our valleys,
By good angels tenanted,
Once a fair and stately palace--
Radiant palace--reared its head.
In the monarch Thought's dominion--
It stood there!
Never seraph spread a pinion
Over fabric half so fair.
II.
Banners yellow, glorious, golden,
On its roof did float and flow;
(This--all this--was in the olden
Time long ago)
And every gentle air that dallied,
In that sweet day,
Along the ramparts plumed and pallid,
A winged odor went away.
III.
Wanderers in that happy valley
Through two luminous windows saw
Spirits moving musically
To a lute's well-tuned law,
Round about a throne, where sitting
(Porphyrogene!)
In state his glory well befitting,
The ruler