ght above the water, but it
gradually rose, like an inclined plane, and resembled in colour, and in
appearance, the skulls of men piled one upon the other. The constant
rippling of the water against the rock had washed out the softer parts,
and made hollows and cavities, that gave the whole formation the precise
appearance of a catacomb. On examination, we discovered it to be a compact
bed of shells, composed of a common description of marine shell from two
to three inches in length, apparently a species of turritella.

BANKS OF PETRIFIED SHELLS.

At about nine miles from the commencement of this formation, it rose to
the height of more than 150 feet; the country became undulating, and a
partial change took place in its vegetation. We stopped at an early hour,
to examine some cliffs, which rising perpendicularly from the water, were
different in character and substance from any we had as yet seen. They
approached a dirty yellow-ochre in colour, that became brighter in hue as
it rose, and, instead of being perforated, were compact and hard.
The waters of the river had, however, made horizontal lines upon their
fronts, which distinctly marked the rise and fall of the river, as the
strength or depth of the grooves distinctly indicated the levels it
generally kept. It did not appear from these lines, that the floods ever
rose more than four feet above the then level of the stream, or that they
continued for any length of time. On breaking off pieces of the rock, we
ascertained that it was composed of one solid mass of sea-shells, of
various kinds, of which the species first mentioned formed the lowest
part.

It rained a good deal during the night, but the morning turned out
remarkably fine. The day was pleasant, for however inconvenient in some
respects the frequent showers had been, they had cooled the air, and
consequently prevented our feeling the heat so much as we should otherwise
have done, in the close and narrow glen we had now entered.

Among the natives who followed us from the last tribe, there was an old
man, who took an uncommon fancy or attachment to Hopkinson, and who
promised, when we separated, to join us again in the course of the day.

FACE OF THE COUNTRY.

As we proceeded down the river we found that it was confined in a glen,
whose extreme breadth was not more than half-a-mile. The hills that rose
on either side of it were of pretty equal height. The alluvial flats were
extremely small, and the bo