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GENERAL INTRODUCTION.

Whether the unexplored part of the Southern Hemisphere be only an immense
mass of water, or contain another continent, as speculative geography
seemed to suggest, was a question which had long engaged the attention, not
only of learned men, but of most of the maritime powers of Europe.

To put an end to all diversity of opinion about a matter so curious and
important, was his majesty's principal motive in directing this voyage to
be undertaken, the history of which is now submitted to the public.

But, in order to give the reader a clear idea of what has been done in it,
and to enable him to judge more accurately, how far the great object that
was proposed, has been obtained, it will be necessary to prefix a short
account of the several voyages which have been made on discoveries to the
Southern Hemisphere, prior to that which I had lately the honour to
conduct, and which I am now going to relate.

1519 Magalhaens.

The first who crossed the vast Pacific Ocean, was Ferdinand Magalhaens, a
Portuguese, who, in the service of Spain, sailed from Seville, with five
ships, on the 10th of April, 1519. He discovered the straits which bear his
name; and having passed through them, on the 27th of November, 1520,
entered the South Pacific Ocean.

In this sea he discovered two uninhabited islands, whose situations are not