French farms are curiously arranged places. In the North of France, at any rate, they are invariably one-storied buildings of rectangular shape surrounding a farmyard with a dung-heap. Near the dung-heap is frequently a pump, so it is not to be wondered at that the greatest care has to be taken in treating water before it is used for drinking purposes by the troops. This is accomplished by large movable chemically charged filters, mounted on wheels and towed by wagon or motor-lorry from place to place as necessity may require. In any place where troops are billeted it becomes necessary to immediately construct incinerators, either of brick or metal, where all rubbish in the shape of empty jam-tins, garbage, etc., can be destroyed and, after being thus burnt, is buried. The result is that ground in France, after being occupied by British troops, is generally left by them in a better state of sanitation than they found it, owing to the measures taken to drain any stagnant water and the free use of chemical disinfectants over any doubtful soil or drainage. The French peasants sometimes express surprise at the precautions taken by the British Army to avoid insanitation, and at the fact that all refuse is buried after being burnt. Owing to the latter we have sometimes been described as _les chats_, the peasants apparently assuming that we have learnt this idea from the habits of the amiable members of the feline tribe. All such undertakings are carried out by that most necessary and efficient party of men known as the Sanitary Squad.