Meantime the foe gave renewed attention to the Toul sector. One new form of attack came from a German aeroplane, which dropped rubber balls filled with liquefied "mustard" gas. The effect of these novel air missiles was not serious. The gas merely infuriated the troops, and when the Germans heavily attacked the American positions with shell fire, gas shells were hurled at the enemy from American batteries. Four gas attacks ware launched at the Germans, whose guns were presently silenced. The Germans later responded by concentrating a heavy gas attack on a town behind the American lines. No wind was blowing and the fumes of the "mustard" gas from the shells hung low over the lines for a long time. The batteries firing the gas shells were located and the American gunners retaliated with doses of gas twice as large as the American positions received. In fact, two towns held by the Germans were so heavily gassed that one of them, Réchicourt, north of Xivray, one of the American targets, was abandoned. German snipers in this sector were also a constant worry to the Americans. As fast as one nest was silenced, another was found, and the task of wiping out the nuisance had to be repeated. In one instance, a group of American snipers discovered an enemy nest close by and promptly opened fire on it. The Germans replied with their rifles, and then fired about three dozen or so of grenades. Apparently the Germans had come to stay and did not intend to be chased out. One of the American 37-millimeter gun teams then got into action against the nest, and owing to its accurate fire no more Germans were seen at this particular point. The Germans were frequently presented with examples of the accuracy of the fire of these 37-millimeter guns. An enemy machine-gun emplacement which had been annoying the Americans was located and then the battery of "little fellows," as the guns were known along the front, got into action, firing rapidly. They secured a number of direct hits and destroyed the emplacement guns. These small guns, which are about the size of a one-pounder, were easily moved from place to place even in the trenches. They also secured direct hits on the junction of communication trenches as men were passing, and into the entrance of the dugout which a number of the enemy were seen to enter and from which smoke was issuing. None of the enemy was seen to come out.