falls in love with, and is conditionally accepted by the very lady who is remotely intitled to those estates; when, the instant he has fulfilled the conditions of their marriage, the family of the person possessed of the estates becomes extinct, and by the concurrence of circumstances, against every one of which the chances were enormous, the hero is re-instated in all his old domains; this is merely improbable.  The distinction which we have been pointing out may be plainly perceived in the events of real life; when any thing takes place of such a nature as we should call, in a fiction, merely improbable, because there are many chances against it, we call it a lucky or unlucky accident, a singular coincidence, something very extraordinary, odd, curious, etc.; whereas any thing which, in a fiction, would be called unnatural, when it actually occurs (and such things do occur), is still called unnatural, inexplicable, unaccountable, inconceivable, etc., epithets which are not applied to events that have merely the balance of chances against them.

Now, though an author who understands human nature is not likely to introduce into his fictions any thing that is unnatural, he will often have much that is improbable:  he may place his personages, by the intervention of accident, in striking situations, and lead them through a course of extraordinary adventures; and yet, in the midst of all this, he will keep up the most perfect consistency of character, and make them act as it would be natural for men to act in such situations and circumstances.  Fielding’s novels are a good illustration of this:  they display great knowledge of mankind; the characters are well preserved; the persons introduced all act as one would naturally expect they should, in the circumstances in which they are placed; but these circumstances are such as it is incalculably improbable should ever exist:  several of the events, taken singly, are much against the chances of probability; but the combination of the whole in a connected series, is next to impossible.  Even the romances which admit a mixture of supernatural agency, are not more unfit to prepare men for real life, than such novels as these; since one might just as reasonably calculate on the intervention of a fairy, as on the train of lucky chances which combine first to involve Tom Jones in his difficulties, and afterwards to extricate him.  Perhaps, indeed, the supernatural fable is of the two not only (as we before remarked) the less mischievous in its moral effects, but also the more correct kind of composition in point of taste:  the author lays down a kind of hypothesis of the existence of ghosts, witches, or fairies, and professes to describe what would take place under that hypothesis; the novelist, on the contrary, makes no demand of extraordinary machinery, but professes to describe what may actually take place, according to the existing laws of human affairs:  if he therefore present us with a series of events quite unlike any which ever do take place, we have reason to complain that he has not made good his professions.