Even in the elementary point of numbers, without some knowledge of which it is so difficult to judge the nature of a field, we are commonly at a loss. Where a smaller force upon the defensive has discomfited a larger attacking force, the dramatic character of such a success (and Crécy was one of them) has naturally led to an exaggeration of the disproportion. The estimate of loss is very commonly magnified and untrustworthy, for that is an element which, in the absence of exact record, both victors and vanquished inevitably tend to enlarge. We are not as a rule given the hours, sometimes, but not often, the state of the weather, and, especially in the earlier cases, the local or tactical result is of so much greater importance to the chronicler than the strategical plan, that we are left with little more knowledge at first hand than the fact that A won and B lost. So true is this, that with regard to the majority of the great actions of the Dark Ages no contemporary record even enables us to fix their site within a few miles. That is true, for instance, of the decisive defeat of Attila in 451, of the Mahommedans by Charles Martel in 732, and of the final victory of Alfred over the Danes in 878. Scholarship has established, with infinite pains and within small limits of doubt, the second and the third. The first is still disputed. So it is with the victory of Clovis over the Visigoths, and with any number of minor actions. Even when we come to the later centuries, and to a more complete knowledge, we are pursued by this difficulty, though it is reduced. Thus we know the square mile within which the Battle of Hastings was fought, but the best authorities have disputed its most important movements and characters. Similarly we can judge the general terrain of most of the Crusading fights, but with no precision, and only at great pains of comparison and collation. The battle which forms the object of this little monograph, late as was its date, was long the subject of debate during the nineteenth century, upon the elementary point of the English position and its aspect. And, though that and other matters may now be regarded as established, we owe our measure of certitude upon them not to any care upon the part of our earliest informers, but to lengthy and close argument conducted in our time. There is no space in such a short book as this to discuss all the causes which combined to produce this negligence of military detail in the medieval historian: that he was usually not a soldier, that after the ninth century armies cannot be regarded as professional, and that the interest of the time lay for the mass of readers in the results rather than in the action of a battle, are but a few of these.