But of far more vital interest is that vast fund of special knowledge which Mr. Belloc has amassed in the indulgence of his tastes in travel and topography. Of this knowledge the evidence to be found in Mr. Belloc's writings is so voluminous and overwhelming that it is as unnecessary as it is impossible to quote freely here. A detailed examination of Mr. Belloc's books on travel will be found in another chapter; if one point more than another needs emphasis here, it is that Mr. Belloc primarily views all country over which he passes from a military standpoint. To accompany Mr. Belloc on a motor run through some part of his own county of Sussex suffices to convince one of this. Whether tramping along causeways and sidepaths, or speeding over railway lines, he cannot pass through any considerable stretch of country without exercising his mind as to the possible advantages that might be afforded opposing armies by this or that natural formation. It is fair to say that this question, if we may call it such, has been uppermost in Mr. Belloc's mind throughout every journey of an extent that he has undertaken, whether in Southern, Western or Eastern Europe. It would be false to imagine that the prime motive of all Mr. Belloc's journeys was to view country purely from the military standpoint, but it is fair to say that almost the first question Mr. Belloc asks himself when he strikes a stretch of country with which he is unfamiliar, and the question he repeatedly and continually asks himself as he traverses that country, is--"How would the natural formation of this country aid or hinder a modern army advancing or retreating through it?" That great stretches of country, notably in France and Belgium, have been visited by Mr. Belloc, moreover, with the definite object of viewing them from a purely military standpoint, it is almost unnecessary to state; no reader who will turn to the pages of _The French Revolution_ or of _Blenheim_ or _Waterloo_, can fail to realize as much for himself. Common sense, indeed, plays a great part in Mr. Belloc's study of history. He regards it as virtually essential that a historian who would describe the action of a great battle of the past should be in a position faithfully to reconstruct the conditions under which that battle was fought. Mr. Belloc himself has settled the vexed question of why the Prussians did not charge at Valmy by visiting the battlefield under the conditions of the battle and discovering that they could not have charged.