This fatal instance of the inveteracy of this disorder, when once introduced into the colony, has not been without its counterpoising benefit. It has induced the local government to adopt proper measures for avoiding the propagation of a similar contagion among the colonists. The vaccine matter was introduced with this view many years back; but as all the children in the colony were immediately inoculated, it was again lost from the want of a sufficient number of subjects to afford a supply of fresh virus; and for many years afterwards, every effort that was made for its re-introduction proved abortive. Through the indefatigable exertions, however, of Doctor Burke, of the Mauritius, the colonists are again in possession of this inestimable blessing; and there can be no doubt that proper precautions will be taken to prevent them from being again deprived of it. The colony of New South Wales possesses every variety of soil, from the sandy heath, and the cold hungry clay, to the fertile loam and the deep vegetable mould. For the distance of five or six miles from the coast, the land is in general extremely barren, being a poor hungry sand, thickly studded with rocks. A few miserable stunted gums, and a dwarf underwood, are the richest productions of the best part of it; while the rest never gives birth to a tree at all, and is only covered with low flowering shrubs, whose infinite diversity, however, and extraordinary beauty, render this wild heath the most interesting part of the country for the botanist, and make even the less scientific beholder forget the nakedness and sterility of the scene. Beyond this barren waste, which thus forms a girdle to the coast, the country suddenly begins to improve. The soil changes to a thin layer of vegetable mould, resting on a stratum of yellow clay, which is again supported by a deep bed of schistus. The trees of the forest are here of the most stately dimensions. Full sized gums and iron barks, along side of which the loftiest trees in this country would appear as pigmies, with the beefwood tree, or as it is generally termed, the forest oak, which is of much humbler growth, are the usual timber. The forest is extremely thick, but there is little or no underwood. A poor sour grass, which is too effectually sheltered from the rays of the sun, to be possessed of any nutritive and fattening properties, shoots up in the intervals. This description of country, with a few exceptions, however, which deserve not to be particularly noticed, forms another girdle of about ten miles in breadth: so that, generally speaking, the colony for about sixteen miles into the interior, may be said to possess a soil, which has naturally no claim to fertility, and will require all the skill and industry of its owners to render it even tolerably productive.