recovering
my sight; and informed me you had an intimate friend at Paris, Dr.
Thevenot, who was particularly celebrated in disorders of the eyes,
whom you would consult about mine, if I would enable you to lay before
him the causes and the symptoms of the complaint. I will do what you
desire, lest I should seem to reject that aid which perhaps may be
offered me by Heaven. It is now, I think, about ten years since I
perceived my vision to grow weak and dull; and at the same time I
was troubled with pain in my kidneys and bowels, accompanied with
flatulency. In the morning, if I began to read, as was my custom,
my eyes instantly ached intensely, but were refreshed after a little
corporeal exercise. The candle which I looked at, seemed as it were
encircled with a rainbow. Not long after the sight in the left part of
the left eye (which I lost some years before the other) became quite
obscured, and prevented me from discerning any object on that
side. The sight in my other eye has now been gradually and sensibly
vanishing away for about three years; some months before it had
entirely perished, though I stood motionless, everything which I
looked at seemed in motion to and fro. A stiff cloudy vapour seemed
to have settled on my forehead and temples, which usually occasions a
sort of somnolent pressure upon my eyes, and particularly from dinner
till the evening. So that I often recollect what is said of the poet
Phineas in the _Argonautics_:

A stupor deep his cloudy temples bound,
And when he walked he seemed as whirling round,
Or in a feeble trance he speechless lay.

I ought not to omit that while I had any sight left, as soon as I lay
down on my bed and turned on either side, a flood of light used to
gush from my closed eyelids. Then, as my sight became daily more
impaired, the colours became more faint and were emitted with a
certain inward crackling sound; but at present, every species of
illumination being, as it were, extinguished, there is diffused around
me nothing but darkness, or darkness mingled and streaked with an
ashy brown. Yet the darkness in which I am perpetually immersed seems
always, both by night and day, to approach nearer to white than black;
and when the eye is rolling in its socket, it admits a little particle
of light, as through a chink. And though your physician may kindle
a small ray of hope, yet I make up my mind to the malady as quite
incurable; and I often reflect, that as the wise