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 to be a discovery of sufficient importance to devote sixteen days to its exploration. It proved to be the embouchure of what is now known as the River Tamar, on which Launceston, the second town of the island, is built. The discoverers sailed up the estuary, following its course for many miles inland. It was found to be alive with aquatic fowls, particularly black swans, sometimes numbering 500 in a flock. This unexpected diversion proved rich sport, and afforded a pleasant interlude to the monotony of life at sea. But the expedition was not for play, but work, and the ship was again upon her course. After a short sail to the westward they found themselves rounding the north-west cape, and with glad hearts could perceive the shore trending away for many a league to the south. The problem was already virtually solved. "Mr. Bass and myself," says Flinders, "hailed it with joy and mutual congratulation, as announcing the completion of our long-wished-for discovery of a passage into the southern Indian Ocean." This fortunate issue of their labours marked an epoch both in the history of discovery and the progress of international commerce. The circuitous route round the south of Van Diemen's Land could henceforth be avoided, and in our day the intervening strait has become the ordinary highway for the Australian trade. It being still deemed advisable to carry out the instructions to the letter, the circumnavigation of the island was prosecuted with varying interest. In the southern parts some