When all is ready, a writer will sometimes start without formal preface, if there is no pressing occasion to clear away preliminaries by that means, though even then his explanation of what he is to say constitutes a virtual preface.
When a formal preface is used, one of the three objects to which a public speaker devotes his exordium may be neglected; the historian, that is, has not to bespeak goodwill—only attention and an open mind. The way to secure the reader's attention is to show that the affairs to be narrated are great in themselves, throw light on Destiny, or come home to his business and bosom; and as to the open mind, the lucidity in the body of the work, which is to secure that, will be facilitated by a preliminary view of the causes in operation and a precise summary of events.
Prefaces of this character have been employed by the best historians—by Herodotus, 'to the end that what befell may not grow dim by lapse of time, seeing that it was great and wondrous, and showed forth withal Greeks vanquishing and barbarians vanquished'; and by Thucydides, 'believing that that war would be great and memorable beyond any previous one; for indeed great calamities took place during its course.'
After the preface, long or short in proportion to the subject, should come an easy natural transition to the narrative; for the body of the history which remains is nothing from beginning to end but a long narrative; it must therefore be graced with the narrative virtues— smooth, level, and consistent progress, neither soaring nor crawling, and the charm of lucidity—which is attained, as I remarked above, partly by the diction, and partly by the treatment of connected events. For, though all parts must be independently perfected, when the first is complete the second will be brought into essential connexion with it, and attached like one link of a chain to another; there must be no possibility of separating them; no mere bundle of parallel threads; the first is not simply to be next to the second, but part of it, their extremities intermingling.
Brevity is always desirable, and especially where matter is abundant; and the problem is less a grammatical than a substantial one; the solution, I mean, is to deal summarily with all immaterial details, and give adequate treatment to the principal events; much, indeed, is better omitted altogether. Suppose yourself giving a dinner, and extremely well provided; there is pastry, game, kickshaws without end, wild boar, hare, sweetbreads; well, you will not produce among these a pike, or a bowl of peasoup, just because they are there in the kitchen; you will dispense with such common things.
Restraint in descriptions of mountains, walls, rivers, and the like, is very important; you must not give the impression that you are making a tasteless display of word-painting, and expatiating independently while the history takes care of itself. Just a light touch—no more than meets the need of clearness—, and you should pass on, evading the snare, and denying yourself all such indulgences. You have the mighty Homer's example in such a case; poet as he is, he yet hurries past Tantalus and Ixion, Tityus and the rest of them. If Parthenius, Euphorion, or Callimachus had been in his place, how many lines do you suppose it would have taken to get the water to Tantalus's lip; how many more to set Ixion spinning? Better still, mark how Thucydides—a very sparing dealer in description—leaves the subject at once, as soon as he has given an idea (very necessary and useful, too) of an engine or a siege-operation, of the conformation of Epipolae, or the Syracusan harbour. It may occur to you that his account of the plague is long; but you must allow for the subject; then you will appreciate his brevity; he is hastening on; it is only that the weight of matter holds him back in spite of himself.
When it comes in your way to introduce a speech, the first requirement is that it should suit the character both of the speaker and of the occasion; the second is (once more) lucidity; but in these cases you have the counsel's right of showing your eloquence.
Not so with praise or censure; these should be sparing, cautious, avoiding hypercriticism and producing proofs, always brief, and never intrusive; historical characters are not prisoners on trial. Without these precautions you will share the ill name of Theopompus, who delights in flinging accusations broadcast, makes a business of the thing in fact, and of himself rather a public prosecutor than a historian.
It may occasionally happen that some extraordinary story has to be introduced; it should be simply narrated, without guarantee of its truth, thrown down for any one to make what he can of it; the writer takes no risks and shows no preference.
But the general principle I would have remembered—it will ever be on my lips—is this: do not write merely with an eye to the present, that those now living may commend and honour you; aim at eternity, compose for posterity, and from it ask your reward; and that reward?—that it be said of you, 'This was a man indeed, free and free-spoken; flattery and servility were not in him; he was truth all through.' It is a name which a man of judgement might well prefer to all the fleeting hopes of the present.