and about sixty from the nearest arm of the Pacific. The
valley in this upper part expanded into a wide basin, bounded
on the north and south by the basaltic platforms, and fronted
by the long range of the snow-clad Cordillera. But we
viewed these grand mountains with regret, for we were
obliged to imagine their nature and productions, instead of
standing, as we had hoped, on their summits. Besides the
useless loss of time which an attempt to ascend the river and
higher would have cost us, we had already been for some
days on half allowance of bread. This, although really
enough for reasonable men, was, after a hard day's march,
rather scanty food: a light stomach and an easy digestion
are good things to talk about, but very unpleasant in practice.

5th. -- Before sunrise we commenced our descent. We
shot down the stream with great rapidity, generally at the
rate of ten knots an hour. In this one day we effected what
had cost us five-and-a-half hard days' labour in ascending.
On the 8th, we reached the Beagle after our twenty-one days'
expedition. Every one, excepting myself, had cause to be
dissatisfied; but to me the ascent afforded a most interesting
section of the great tertiary formation of Patagonia.

On March 1st, 1833, and again on March 16th, 1834, the
Beagle anchored in Berkeley Sound, in East Falkland Island.
This archipelago is situated in nearly the same latitude with
the mouth of the Strait of Magellan; it covers a space of
one hundred and twenty by sixty geographical miles, and is
little more than half the size of Ireland. After the possession
of these miserable islands had been contested by France,