Cavalry detachments are sent scurrying across the front, as though threatening an attack, deliberately furnishing a mark for the enemy gunners that this object of ascertaining his strength may be attained. The more ordinary work of scouting, advance guard work, and riding wide on the flanks of an advancing force are parts of the cavalryman's work which are more familiar. In the European conflict with tremendous concentration of troops and continued occupation of the same territory the foraging feature of cavalry work disappeared. It is no longer possible for an army to "live on the country as it goes." Food and supplies must be brought up from depots in the rear through an entirely separate and specialized department of the military organization, which does its work with a celerity certainly undreamed of in former days, even as late as our own war with Spain. In the modern campaign trenches have been developed to such an extent that it is really marvellous how the soldiers live, and to what an extent the "underground fortresses" have been used for living as well as fighting purposes. In a letter written by a French soldier who took part in a successful raid upon a German trench, he adequately describes the luxuries enjoyed by the German soldiers in the front line trenches in the Marne. The letter was written by a youth who had been wounded in the fight, and was mailed in April, 1917. LUXURIOUS DUGOUTS. "We are now living in German lines and dugouts--a magnificent work we have just now taken--cement and steel are used with profusion, and electricity in every dugout, even in their front lines. Unharmed casements and machine guns in cemented shelters and light railways and immense reserves of food--thousands of bottles of claret. "But also, at the middle of each staircase, in the wall, a box with about seventy pounds of cheddite--to blow the shelter up in case of retreat. They knew they might have to go back, as they are doing now. America will gain victory, as until the present moment only the bravery of our soldiers can put them back, with much exertion and frequent loss. "Our men are magnificent in spite of death. We hope your help may be quick and decisive. I think your flying corps especially may be useful, the more as yesterday, with four fellows, I was run through the field, and in a destroyed trench by a German Albatross shooting a machine gun, and flying very low, he missed us quite near. On the other hand, we have just a few days hence seen a sausage balloon destroyed by our men. Anyhow your help may be decisive. "I believe your joy is great about the Russian revolution. At home they are happy, too--only let us hope the Russian army may attack this summer--to help us. "I need not tell you the impression made by your American decision here. We now know victory is sure. Let us hope it may be this year--though you may easily guess such is not my belief--next year.