So far as discovery is concerned, it is evident, from the sketch of it already given, that nearly the entire outline of the globe had been traced before the period at which we are arrived:  what remained was to fill up this outline.  In Asia, to gain a more complete knowledge of Hither and Farther India, of China, of the countries to the north of Hindostan, of the north and north-east of Asia, and of some of the Asiatic islands.  In Africa, little besides the shores were known; but the nature of the interior, with its burning sands and climate, uninhabitable, or inhabited by inhospitable and barbarous tribes, held out little expectation that another century would add much to our knowledge of that quarter of the world; and though the perseverance and enterprise of the eighteenth century, and what has passed of the nineteenth, have done more than might reasonably have been anticipated, yet, comparatively speaking, how little do we yet know of Africa!  America held out the most promising as well as extensive views to future discovery; the form and direction of her north-west coast was to be traced.  In South America, the Spaniards had already gained a considerable knowledge of the countries lying between the Atlantic and the Pacific, but in North America, the British colonists had penetrated to a very short distance from the shores on which they were first settled; and from their most western habitations to the Pacific, the country was almost entirely unknown.

The immense extent of the Pacific Ocean, which presented to navigators at the beginning of the eighteenth century but few islands, seemed to promise a more abundant harvest to repeated and more minute examination, and this promise has been fulfilled.  New Holland, however, was the only portion of the world of great extent which could be said to be almost entirely unknown at the beginning of the eighteenth century; and the completion of our knowledge of its form and extent may justly be regarded as one of the greatest and most important occurrences to geography contributed by the eighteenth century.

The truth and justice of these observations will, we trust, convince our readers, that, in determining to be more general and concise in what remains of the geographical portion of our works, we shall not be destroying its consistency or altering the nature of its plan, but in fact preserving both; for its great object and design was to trace geographical knowledge from its infancy till it had reached that maturity and vigour, by which, in connection with the corresponding increased civilization, general information and commerce of the world, it was able to advance with rapid strides, and no longer confining itself to geography, strictly so called, to embrace the natural history of those countries, the existence, extent, and form of which it had first ascertained.