Lieutenant-General De VAULT, who had succeeded Marshal De MAILLEBOIS as director of the _Dépôt de la guerre_, conceived, and executed a plan, destined to render still more familiar and secure the numerous documents collected in this establishment. He first retrenched from the _Military Correspondences and Memoirs_ all tedious repetitions and unnecessary details; he then classed the remainder under the head of a different army or operation, without subjecting himself to any other order than a simple chronology; but he caused each volume to be preceded by a very succinct, historical summary, in order to enable the reader to seize the essence of the original memoirs and documents, the text of which was faithfully copied in the body of each volume, In this manner did he arrange all the military events from the German war in 1677 to the peace of 1763. This analysis forms one hundred and twenty five volumes. It is easy to conceive how much more interesting these historical volumes became by the addition, which took place about the same epoch, of the labours of the geographical engineers employed in the armies. The military men having it at the same time in his power to follow the combinations of the generals with the execution of their plans, imbibes, without difficulty, the principles followed by great captains, or improves himself from the exact account of the errors and faults which it is so natural to commit on critical occasions. When all the establishments of the old _régime_ were tottering, or threatened by the revolutionary storm, measures were suggested for preserving the _Dépôt de la guerre_, and, towards the end of 1791, it was transferred from Versailles to Paris. Presently the new system of government, the war declared against the emperor, and the foreseen conflagration of Europe, concurred to give a new importance to this establishment. Alone, amidst the general overthrow, it had preserved a valuable collection of the military and topographical labours of the monarchy, of manuscripts of the greatest importance, and a body of information of every kind respecting the resources, and the country, of the powers already hostile, or on the point of becoming so. All the utility which might result from the _Dépôt_ was then felt, and it was thought necessary to give it a new organization.[2]