Since November, the French have had troops of all categories on the firing-line, and I should judge by this that since November, if not earlier, the French have had all their available men in service. Among my personal acquaintances in France, I know no man liable for service who has not been in the army from that date onward. The men who for physical reasons were earlier refused are now being quite generally accepted as volunteers and are put to office work or similar occupations. I have seen great numbers of wounded Territorials in France, and many Territorial prisoners in the prison camps in Germany. When I visited the prison camp at Zossen (near Berlin) where there are said to be 20,000 French prisoners, a large percentage (perhaps as much as 50 per cent.) of the prisoners I saw were Territorials. The Germans have very well-developed and well-organized systems of relays for their men at the front. The infantry stay in the trenches for about a month at a time and are then given a vacation, usually being sent home to their garrison town. Their cavalry serve ten days at the front and are then sent a day's march to the rear for a ten-days' rest. Their artillerymen get no vacation, their lives being considered easy enough. I saw no evidence of any well-organized system of vacations among either the French or British and I knew many isolated cases where personal friends of mine, both officers and enlisted men, have been at the front continuously since the beginning of the war. I am fairly certain that the British enlisted man has had no vacation since the beginning of the war, other than relaying near the front. I would mention again, in order to emphasize the statement, that all my observations have led me to believe that the essentials of military preparedness are, first of all, a rapid mobilization, without this everything else is useless. By "rapid" I mean a mobilization of at least half a million men or upward in not more than ten days. After this in importance comes the ability to hide, to dig, and to shoot. To hide is impossible when wearing a uniform as conspicuous as the French, which might be called maximum, and has, I should estimate, been the cause of from three to four hundred thousand extra casualties.