The other two factors in an historical judgment can be more easily measured.
The non-human elements which, as I have said, are irremovable (save to miracle), are topography, climate, season, local physical conditions, and so forth. They have two valuable characters in aid of history; the first is that they correct the errors of human memory and support the accuracy of details; the second is that they enable us to complete a picture. We can by their aid “see” the physical framework in which an action took place, and such a landscape helps the judgment of things past as it does of things contemporary. Thus the map, the date, the soil, the contours of Crécy field make the traditional spot at which the King of Bohemia fell doubtful; the same factors make it certain that Drouet did not plunge haphazard through Argonne on the night of June 21, 1791, but that he must have gone by one path—which can be determined.
Or, again, take that prime question, why the Prussians did not charge at Valmy. On their failure to do so all the success of the Revolution turned. A man may read Dumouriez, Kellermann, Pully, Botidoux, Massenback, Goethe—there are fifty eye-witnesses at least whose evidence we can collect, and I defy anyone to decide. (Brunswick himself never knew.) But go to that roll of land between Valmy and the high road; go after three days’ rain as the allies did, and you will immediately learn. That field between the heights of “The Moon” and the site of old Valmy mill, which is as hard as a brick in summer (when the experts visit it), is a marsh of the worst under an autumn drizzle; no one could have charged.
As for human testimony, three things appear: first, that the witness is not, as in a law court, circumscribed. His relation may vary infinitely in degree of proximity of time or space to the action, from that of an eye-witness writing within the hour to that of a partisan writing at tenth hand a lifetime after. That question of proximity comes first, from the known action of the human mind whereby it transforms colours and changes remembered things. Next there is the character of the witness for the purposes of his testimony. Historians write, too often, as though virtue—or wealth (with which they often confound it)—were the test. It is not, short of a known motive for lying; a murderer or a thief casually witnessing to a thing with which he is familiar is worth more than the best man witnessing in a matter which he understands ill. It was this error which ruined Croker’s essay on Charlotte Robespierre’s Memoirs. Croker thought, perhaps wisely, that all radicals were scoundrels; he could not accept her editor’s evidence, and (by the way) the view of this amateur collector without a tincture of historical scholarship actually imposed itself on Europe for nearly seventy years!
And the third character in the witness is support: the support upon converging lines of other human testimony, most of it indifferent, some (this is essential) casual and by the way—deprived therefore of motive.
When I shall find these canons satisfied to oppose the strong probability and tradition of the Dauphin’s death in prison I shall doubt that death, but not before.
[The Absence of the Past]
It is perhaps not possible to put into human language that emotion which rises when a man stands upon some plot of European soil and can say with certitude to himself: “Such and such great, or wonderful, or beautiful things happened here.”
Touch that emotion ever so lightly and it tumbles into the commonplace, and the deadest of commonplace. Neglect it ever so little and the Present (which is never really there, for even as you walk across Trafalgar Square it is yesterday and tomorrow that are in your mind), the Present, I say, or rather the immediate flow of things, occupies you altogether. But there is a mood, and it is a mood common in men who have read and who have travelled, in which one is overwhelmed by the sanctity of a place on which men have done this or that a long, long time ago.
Here it is that the gentle supports which have been framed for human life by that power which launched it come in and help a man. Time does not remain, but space does, and though we cannot seize the Past physically we can stand physically upon the site, and we can have (if I may so express myself) a physical communion with the Past by occupying that very spot which the past greatness of man or of event has occupied.