his important work he was engaged until 1767, Captain Palliser, who
succeeded Captain Graves as Governor, being only too glad to avail
himself of Cook's services.

The charts he made during these years in the schooner Grenville were
admirable. The best proof of their excellence is that they are not yet
wholly superseded by the more detailed surveys of modern times. Like all
first surveys of a practically unknown shore, and especially when that
shore abounds in rocks and shoals, and is much indented with bays and
creeks, they are imperfect, in the sense of having many omissions; but
when the amount of the ground covered, and the impediments of fogs and
bad weather on that coast is considered, and that Cook had at the most
only one assistant, their accuracy is truly astonishing. The originals of
these surveys form part of the most precious possessions of the
Hydrographic Office of the Admiralty.

We now approach the crowning achievements of Cook's life.

After many years' neglect the exploration of the Pacific was awaking
interest. This great ocean, which very few, even to this day, realise
occupies nearly one half of the surface of the globe, had been, since the
first voyage of Magellan, crossed by many a vessel.

Notwithstanding, very little was known of the islands occupying its
central portion.

For this there were two reasons. First, the comparatively small area
covered by islands; secondly, the fact that nearly all who traversed it
had followed Magellan's track, or, if they started, as many did, from
Central America, they made straight for Magellan's discovery, the Ladrone
Islands. For this, again, there was a reason.

Few sailed for the purpose of exploration pure and simple; and even those
who started with that view found, when embarked on that vast expanse,
that prudence dictated that they should have a moderate certainty of, by
a certain time, falling in with a place of sure refreshment. The
provisions they carried were bad at starting, and by the time they had
fought their way through the Straits of Magellan were already worse;
water was limited, and would not hold out more than a given number of
days. Every voyage that is pursued tells the same story--short of water,
and eagerly looking out for an opportunity of replenishing it. The winds
were found to blow in fixed directions, and each voyager was fearful of
deviating from the track on which it was known they would be fair, for
fear of delays. And ever