On his third and final voyage to the Pacific, Captain Cook touched at Van Diemen's Land in the Resolution, then accompanied by Captain Clerke. He sighted the island bearing north-west half-west, distant three leagues from Mewstone. A neighbouring rock, unnoticed by Furneaux, he called the Eddystone, from its resemblance to an English lighthouse of that name. Detained by calms, he did not reach Adventure Bay until the 26th, where at 4 P.M. he dropped anchor in twelve fathoms, within a mile of the shore. The officers were delighted with the country, and particularly with its gigantic forests. Mr. Anderson, the surgeon, spent his leisure wandering on the beach of Adventure Bay; angling in a lake, or ascending the neighbouring hills.[6] Captain Cook left swine on the shore, which were driven into the bush when the natives were not present; in the hope they might escape them, and thus add to the resources of the country. He departed on the 30th for New Zealand. The account left by Cook is chiefly interesting for its description of the natives, and will be noticed in the history of that unfortunate people.

On the 3rd July, 1789, the brig Mercury, John Henry Cox, master, entered a deep bay on the south side of Van Diemen's Land, and was about ten miles from the Mewstone: attempting Adventure Bay, he was carried to the eastward, and afterwards accidentally discovered Oyster Bay.

Captain Wm. Bligh, subsequently governor of New South Wales, touched at Van Diemen's Land in 1788, when on his voyage to Tahiti, whence he was instructed to convey the bread fruit tree to the West India Islands. His object was frustrated by the mutiny of his crew; and after a passage in an open boat, attended with extraordinary perils, he reached Great Britain. The Providence and Assistant were placed under his command: he was sent on the same errand, in which he was successful, and re-appeared in Adventure Bay in 1792. During his stay he planted several fruit trees, acorns, and vegetables.

An inscription found by the French crew on a tree, signified that near by, "Captain William Bligh planted seven fruit trees: Messrs. T. and W., botanists." They consisted of one fig, two pomegranates, and four quinces. An apple tree was found by Labillardière on the coast. They doubtless all perished. The Frenchman was greatly scandalised by the despotism which condemned men of science to initials, and gave a sea captain a monopoly of fame.

This celebrated naturalist was attached to the expedition of Rear-Admiral Bruné D'Entrecasteaux, sent out by the government of France to ascertain the fate of La Perouse, whose amiable reputation conciliated the good-will of all parties. Although concluded that the vessel he commanded must be lost, it was fondly hoped that he still survived. The national assembly paused in the midst of its conflict with the king, to request that vessels might be dispatched, and rewards offered, for his relief. In his decree, Louis XVI. describes the expedition as intended, beyond its primary design, to perfect the description of the globe. On the day the first colonists of New South Wales entered Port Jackson, the expedition of La Perouse was seen by the astonished English approaching the coast. After an interchange of those civilities which dignify the intercourse of polished nations, he left New Holland.

In a letter, dated September, 1787, Perouse stated his intention "to employ six months in visiting the Friendly Islands to procure refreshments; the south-west coast of Mendana, the land of the Arsacides, with that of Louisiade, as far as New Guinea."[7]

Many years after, relics were recovered, which demonstrated the vicinity of his misfortunes. A lascar informed Captain Peter Dillon, of the East India Company's service, that two Frenchmen survived at Manicola; he therefore visited the island, where he found several relics of the lost admiral, although the Frenchmen were dead; among the rest his sword guard, marked with his cypher.[8] Dillon was honored by the French government with the title of Chevalier, and received a pension.

In 1792, D'Entrecasteaux in the Recherche, and Captain Huon Kermandee in the Esperance, reached Van Diemen's Land. On the 20th April, when looking for Adventure Bay, they discovered the channel which bears the name of D'Entrecasteaux. They remained a month, when they departed on their search, and returned on the 20th January, 1793, to complete their observations. They found that the channel extended to the Storm Bay of Tasman: they entered and named the Huon, and the Rivère du Nord, now the Derwent, and examined the different harbours. Their charts are said to exhibit the finest specimen of marine surveying ever made in a new country.[9] Of D'Entrecasteaux's Channel, then deemed the most important discovery since the time of Tasman, Rossel, who recorded the events of the voyage, writes with rapture:—"A harbour, twenty-four miles in length, and equally safe in every part. Such a retreat, in a gulph which bears the menacing name of Storm Bay, is a luxury that, to be able to express, must be felt."

Captain John Hayes, of the Bombay marine, with the private ships Duke and Duchess, examined Storm Bay and D'Entrecasteaux's Channel, in 1794. He passed up the Rivère du Nord much farther than the French, which he called the Derwent; and in his passage affixed names to various places, which have effaced those given by the original French discoverers—whose survey, however, to the extent of their navigation, was more correct than his own.

The form of Van Diemen's Land had long been a nautical problem. Captain Hunter, observing the swell of the ocean, deemed the existence of a strait highly probable. Mr. George Bass, surgeon of the royal navy, a gentleman to whom his generous friend Flinders refers with great admiration, resolved to test the conjecture. He had already given proof of intrepidity: in company with Flinders and a boy, he embarked in a boat, eight feet long, called Tom Thumb. After escaping great dangers, they returned to Port Jackson with valuable information respecting the coast.