of an island, is that of being capable of a convenient union under one government, and of deriving thence a security from all external attacks, except by sea.  In lands of very great magnitude such an union is difficult, if not impracticable, and a distinction founded on this circumstance, is therefore sufficient for convenience at least, if*** not for speculative accuracy.  If we suppose this extent to be something about one thousand miles each way, without, however, affecting much rigour in the limitation, the claim of New Holland to be called a continent, will be indisputable:  The greatest extent of that vast country being, from East to West, about two thousand four hundred English miles, and, from North to South, not less than two thousand three hundred.****

[* Insula, from which island is derived, is formed from in sulo, in the sea; and, the corresponding word in Greek, is usually deduced from to swim, as appearing, and probably having been originally supposed to swim in the sea.]

[** Thus when Dionysius Periegetes considers the whole ancient world as surrounded by the sea, he calls it, an immense island; on which Eustathius remarks, that the addition of the epithet immense was necessary, otherwise the expression would have been low and inadequate.]

[*** We do not here consider whether a country be actually united under one government, but whether from its size it might be so conveniently.  If we might derive from, or to inhabit, the etymological distinction would be complete on these principles.  An island being one distinct habitation of men; and a continent land continued from one state to another.  The former derivation might be rendered specious by remarking how singularly Homer and others use with, as if they had a natural connection.  See ii.  B. 626. and, Sophoc.  Ajax. 601.]

[**** In or near the latitude of 30 deg.  South, New Holland extends full 40 degrees of longitude, which, under that parallel, may be estimated at 60 English miles to a degree.  The extent from York Cape to South Cape is full 33 degrees of latitude, which are calculated of course at 691/2 English miles each.]

To New South Wales England has the claim which a tacit consent has generally made decisive among the European States, that of prior discovery.  The whole of that Eastern coast, except the very Southern point, having been untouched by any navigator, till it was explored by Captain Cook.  This consideration, added to the more favourable accounts given of this side of the continent than of the other, was sufficient to decide the choice of the British government, in appointing a place for the banishment of a certain class of criminals.

The cause of the determination to send out in this manner the convicts under sentence of transportation, was, as is well known, the necessary cessation of their removal to America; and the inconveniences experienced in the other modes of destination adopted after that period.