Mercury.  We met two Polish ladies here, who were amusing themselves in copying the fresques.  We returned to Naples at five o’clock, and dined at the Villa di Napoli.  In the evening we went to the Teatro de’ Fiorentini.  The piece performed was Pamela or La virtu premiata, which I understand is quite a stock piece in Italy.  It is written by Goldoni.  It was very badly performed; the actors were not perfect in their parts, and the prompter’s voice was as loud as usual.  The costume was appropriate enough, which is far from being always the case at this theatre.

NAPLES, 13 Octr.

We started on the 12th at six o’clock in the morning (Mr R----- D. and
myself) in a caleche in order to visit Puzzuoli, Baii and all the
classical ground in that direction.  We of course passed through the grotto
of Pausilippo.  This grotto is thirty feet high and about five hundred feet
long.  In fact, it is a vast rock undermined and a high road running thro’
it, the breadth of which is sufficient for three carriages to go abreast. 
From its great length it is of course exceeding dark; in order therefore to
obviate this inconvenience lamps constantly lighted are suspended from the
roof and on the sides of the grotto, and holes pierced towards the top to
admit a little daylight.  The road pierced thro’ this rock and called the
grotto of Pausilippo abridges the journey to Puzzuoli very considerably, as
otherwise you would be obliged to go round by Cape Margelina, which would
increase the distance ten miles.  On issuing from the grotto on the other
side, you arrive in a few minutes on the seashore, on the bay formed
between Cape Margelina and Puzzuoli.  We stopped at the lake Agnano which is
strongly impregnated with sulfur.  On the banks of this lake are the
Thermae or vapour baths, and here is also the famous Grotto del Cane,
the pestilential vapour arising from which rises about three inches from
the ground and has the appearance of a spider’s web.  An unfortunate dog
performs the miracle of the resurrection to all those who visit this
natural curiosity; and we also were curious to see its effect.  The guardian
of the Thermes seized the poor animal and held his nose close to the place
from whence the vapour exhales.  The dog was seized with strong convulsions
and in two minutes he was perfectly senseless and to all appearance dead;
but on being placed in the open air, he soon recovers.  The poor beast shews
evident repugnance to the experiment, and I wonder he does not endeavor to
make his escape, for he has sometimes to perform this feat four or five
times a day.  I should suppose that he will not be very long lived, for the
repeated doses of this mephitic vapour must surely accelerate his
dissolution.  The heat of the Thermae and steam of the sulphur is almost
insupportable; but it has a most beneficial effect on maladies of the
nerves and cutaneous complaints.

We then proceeded on our journey to Puzzuoli, the