Another interesting geographical problem to be determined, was whether a great river system drained any part of the Australian continent. In the existing state of knowledge the country presented an aspect in regard to fluvial features wholly different from any other portion of the world. No river of considerable importance had been found. Students of geography could hardly conceive that there should be so large an area of land lacking outlets to the sea; and as none had been found in the parts investigated so far, it was believed that the exploration of the south coast would reveal large streams flowing from the interior. Some had speculated that within the country there was a great inland sea, and if so there would probably be rivers flowing from it to the ocean.

A third main subject for elucidation when Flinders entered upon this work, was whether the country known as Van Diemen's Land was part of the continent, or was divided from it by a strait not yet discovered. Captain Cook entertained the opinion that a strait existed. On his voyage in the Endeavour in 1770, he was "doubtful whether they are one land or no." But when near the north-eastern corner of Van Diemen's Land, he had been twenty months at sea, and his supplies had become depleted. He did not deem it advisable to sail west and settle the question forthwith, but, running up the eastern coast of New Holland, achieved discoveries certainly great enough for one voyage. He retained the point in his mind, however, and would have determined it on his second voyage in 1772 to 1774 had he not paid heed to information given by Tobias Furneaux. The Adventure, commanded by Furneaux, had been separated from the Resolution on the voyage to New Zealand, and had cruised for some days in the neighbourhood of the eastern entrance to Bass Strait. But Furneaux convinced himself that no strait existed, and reported to that effect when he rejoined Cook in Queen Charlotte's Sound. Cook was not quite convinced by the statement of his officer; but contrary winds made a return to the latitude of the supposed strait difficult, and Cook though "half inclined to go over to Van Diemen's Land and settle the question of its being part of New Holland" decided to proceed westward. As will be seen hereafter, Flinders helped to show that the passage existed.

There were also many smaller points requiring investigation. Cook in running along the east coast had passed several portions in the night, or at such a distance in the daytime as to render his representation of the coastline doubtful. Some groups of islands also required to be accurately charted. Indeed, it may be said that there was no portion of the world where, at this period, there was so much and such valuable work to be done by a competent and keen marine explorer, as in Australia.

A passage in a manuscript by Flinders may be quoted to supplement what has been written above, as it indicates the kind of speculations that were current in the conversation of students of geography.* (* Called an Abridged Narrative—Flinders' Papers.)

"The interior of this new region, in extent nearly equal to all Europe, strongly excited the curiosity of geographers and naturalists; and the more so as, ten years after the establishment of a British Colony at Port Jackson on the east coast, and the repeated effort of some enterprising individuals, no part of it beyond 30 leagues from the coast had been seen by an European. Various conjectures were entertained upon the probable consistence of this extensive space. Was it a vast desert? Was it occupied by an immense lake—a second Caspian Sea, or by a Mediterranean to which existed a navigable entrance in some part of the coasts hitherto unexplored? or was not this new continent rather divided into two or more islands by straits communicating from the unknown parts of the south to the imperfectly examined north-west coast or to the Gulf of Carpentaria, or to both? Such were the questions that excited the interest and divided the opinion of geographers."

Apart from particular directions in which enquiry needed to be pursued, it was felt in England that the only nation which had founded a settlement on the Australian continent was under an obligation to complete the exploration of the country. The French had already sent out two scientific expeditions with instructions to examine the unknown southern coasts; and if shipwreck had not destroyed the first, and want of fresh water diverted the second, the credit of finishing the outline of the map of Australia would have been earned for France. "Many circumstances, indeed," wrote Flinders, "united to render the south coast of Terra Australis one of the most interesting parts of the globe to which discovery could be directed at the beginning of the nineteenth century. Its investigation had formed a part of the instructions to the unfortunate French navigator, Laperouse, and afterwards of those to his countryman Dentrecasteaux; and it was not without some reason attributed to England as a reproach that an imaginary line of more than two hundred and fifty leagues' extent in the vicinity of one of her colonies should have been so long suffered to remain traced upon the charts under the title of Unknown Coast. This comported ill with her reputation as the first of maritime powers."

We shall see how predominant was the share of Flinders in the settlement of these problems, the filling up of these gaps.

CHAPTER 6. THE RELIANCE AND THE TOM THUMB.

Apart from Admiral Pasley, two officers who participated in Lord Howe's victory on "the glorious First of June," had an important influence upon the later career of Flinders. The first of these, Captain John Hunter, had served on the flagship Queen Charlotte. The second, Henry Waterhouse, had been fifth lieutenant on the Bellerophon. Flinders was under the orders of both of them on his next voyage.