October 21st was devoted to reconnaissance. The commanding officer, Colonel Conklin of the 303rd F. A. and staff arrived. An air raid by the enemy occurred at 7.00 p. m. They are all alike. This is what happens. Delicate instruments more sensitive than the human ear detect the sound of the aeroplane’s engines at a great distance. These instruments are placed at intervals along the lines at what are known as listening posts or stations. Directly an enemy plane is detected, its whereabouts and direction are telephoned to the areas behind. There, the fact is announced by a bugle call, followed by rattles, sirens and every other variety of music. This is the first you know of the “ships that pass in the night.” There is a scramble for the nearest abri, otherwise known as bomb-proof or dug-out. You stumble and fall down a flight of steps and find yourself from twenty to forty feet below ground. It is dark, and the air is damp and smells vilely. There are from fifty to a hundred other humans in this subterranean tomb, some lie down, prepared to spend the night, others, half-clad, shiver and wait. Then out of the distance you hear a faint humming as of insects in summer. It grows louder. It is the engines of the enemy’s planes. Suddenly Hell is torn loose. The anti-aircraft guns or Archies, as the British call them, have opened fire from the ground. The planes return the compliment with bombs and machine guns. A boiler factory in your head would not be nearly so bad for your ears as the cracking and shrieking that takes place. As suddenly as it started it ceases. All is quiet. We go about our duties or sleep, as the case may be, until the next raid occurs. If it is a clear night and the planes are likely to return, there are many who prefer to stay in the dug-out and make a night of it there rather than spend the time until morning running back and forth. October 22nd the work of reconnaissance for battery positions and P. C.s[C] continued. More enemy planes were seen over St. Mihiel. But this time it was broad daylight; they reconnoitered and took photographs, but there was no battle royal to disturb the peace. Suddenly little balls of cotton appeared about the plane. They were the bursts of some distant anti-aircraft battery trying to annoy the aviator. October 23rd the commanding officer (Colonel Platt) of the 302nd F. A. and staff arrived. In the afternoon enemy airplanes made a reconnaissance. The regimental advanced parties arrived. Reconnaissance was the chief work of the next few days. Lieutenant Colonel McCabe of the 302nd taking the area to the north of Bonzee. The Germans must have had the same idea, for enemy aircraft continued to pass over Headquarters. On October 28th the 33rd Division relieved the 79th Division in this sector, the 55th Field Artillery Brigade remaining in place, with its Headquarters at Troyon (P. C. Kilbreith). [Illustration: BRIGADIER-GENERAL DANIEL F. CRAIG]