o a great stupor,
with slower pulse than natural, and a slow moaning respiration, in which he
continued about another half hour, and then recovered.

The sequel of this disease was favourable; he was directed one grain of
opium at six every morning, and then to rise out of bed; at half past six
he was directed fifteen drops of laudanum in a glass of wine and water. The
first day the paroxysm became shorter, and less violent. The dose of opium
was increased to one-half more, and in three or four days the fits left
him. The bark and filings of iron were also exhibited twice a day; and I
believe the complaint returned no more.

2. In this paroxysm it must be observed, that he began with pain, and ended
with stupor, in both circumstances resembling a fit of epilepsy. And that
therefore the exertions both of mind and body, both the voluntary ones, and
those immediately excited by pleasurable sensation, were exertions to
relieve pain.

The hunting scene appeared to be rather an act of memory than of
imagination, and was therefore rather a voluntary exertion, though attended
with the pleasurable eagerness, which was the consequence of those ideas
recalled by recollection, and not the cause of them.

These ideas thus voluntarily recollected were succeeded by sensations of
pleasure, though his senses were unaffected by the stimuli of visible or
audible objects; or so weakly excited by them as not to produce sensation
or attention. And the pleasure thus excited by volition produced other
ideas and other motions in consequence of the sensorial power of sensation.
Whence the mixed catenations of voluntary and sensitive ideas and muscular
motions in reverie; which, like every other kind of vehement exertion,
contribute to relieve pain, by expending a large quantity of sensorial
power.

Those fits generally commence during sleep, from whence I suppose they have
been thought to have some connection with sleep, and have thence been
termed Somnambulism; but their commencement during sleep is owing to our
increased excitability by internal sensations at that time, as explained in
Sect. XVIII. 14. and 15., and not to any similitude between reverie and
sleep.

3. I was once concerned for a very elegant and ingenious young lady, who
had a reverie on alternate days, which continued nearly the whole day; and
as in her days of disease she took up the same kind of ideas, which she had
conversed about on the alternate day before, and could