At night, on the main road, I have watched for hours the dimmed lights of the _camions_, winding away north and south like the coils of some giant and luminous snake which never stopped and never ended. It was impressive evidence of a great organisation that depended and was founded on the initiative of its members. Behind each light was a unit, the driver, whose momentary negligence might throw the whole line into confusion. Yet there were no fixed rules to save him from using his brain quickly and surely as each crisis presented itself. He must be continually awake to avoid any one of a thousand possible mischances. The holes and ice on the road, his skidding car, the cars passing in the same and opposite directions, the cars in front and behind, the cars broken down on the sides of the road—all these and many other things he had to consider before using brake or throttle in making his way along. Often snow and sleet storms were added to make driving more difficult. Objects six feet away were completely invisible, and it was only by watching the trees along the side of the road that one could attempt to steer. I was connected with the _Service des Autos_ as a driver in Section No. 2 of the Field Service of the American Ambulance of Neuilly. We had the usual French section of twenty ambulances and one staff car, but, unlike the other sections, we had only one man to a car. There were two officers, one the Chief of Section, Walter Lovell, a graduate of Harvard University and formerly a member of the Boston Stock Exchange; and George Roder, Mechanical Officer, in charge of the supply of parts and the repair of cars. Before the war, he was a promising bacteriologist in the Rockefeller Institute. Our section was one of five which compose the field service of the American Ambulance, and are located at various points along the front from Dunkirk to the Vosges. The general direction of the Field Service is in the hands of A. Piatt Andrew, formerly professor at Harvard and Assistant Secretary of the United States Treasury. He has organised the system by which volunteers and funds are obtained in America, and is the responsible link between the work of the service and the will of the French authorities.