At Pont-Ste.-Maxence, a bridge capable of supporting the heaviest traffic was constructed in a few hours. Big canal boats which were lying idle in the neighborhood were requisitioned and anchored side by side, touching each other. Their decks were made flush, each with the other, by the shifting of ballast, and when this had been accomplished a roadway was laid across them. This bridge was so satisfactory that it has not yet been replaced by a permanent structure. Road building was largely carried on among the French by infantry, and it was my experience that trench building was exclusively done by the infantry as it was found necessary. The positions and traces of trenches were laid out by infantry officers. This latter conclusion is, however, based on three or four observations only. SUPPLIES In the French army the reserve small arms ammunition is kept behind the battle-line just out of reach of shell-fire. There are ammunition train regiments just as there are infantry or cavalry regiments. Each such regiment is composed of eighty odd ammunition wagons and some forage wagons. Two regiments generally move together, thus forming an ammunition brigade. These wagons are parked parallel to the line of battle. Supply columns are always parked vertically to the line of battle. In the Battle of the Marne I observed an ammunition brigade about every twenty kilometers. Thus on September 11th, there were brigades at Rebais (7th and 10th Regiments), at Montmirail (17th and 29th), and at Champaubert. The supplies, chiefly beef and bread, are brought up from the rear and advance directly toward the battle-line in long horse-drawn wagon trains, or in Paris auto-busses. When near the front, small numbers of wagons go up as far as they dare and supplies are distributed directly to the troops, often while they are under long-range shell-fire. MOTOR TRANSPORT In the matter of motor transport, the practice with the French and British has become well defined. The best type of truck is one of medium weight, and of the best construction obtainable. It should be emphasized that medium-priced or inexpensive trucks are undesirable. It is very distinctly the opinion of French and British transport officers that it is better to have too few trucks, all of which are reliable, than to take "any old truck" and have it break down at critical moments during operation. Inferior trucks break down frequently, and break down at critical moments with singular regularity.