These were our last days of waiting and wondering whether the Boche would attack; of the artillery duels and the minor raids by which each side sought to feel and test the other's strength. I recall two or three further incidents of our stay in that part of the line. The G.O.C., R.A., of Corps decided that a rare opportunity presented itself for training junior officers in quick picking up of targets, shooting over open sights, and voice-command of batteries from near sighting-places where telephone wires could be dispensed with and orders shouted through a megaphone. "It will quite likely come to that," he observed. "The next fighting will be of the real open warfare type, and the value of almost mechanical acquaintance with drill is that the officer possessing such knowledge can use all his spare brains to deal with the changing phases of the actual battle." So a single 18-pdr. used to be pulled out for practice purposes, and Generals and infantry officers came to see gunner subalterns schooled and tested. It was better practice than Shoeburyness or Larkhill, because though the shoots were carried out on the gunnery school model the shells were directed at real targets. During one series a distinguished red-tabbed party was dispersed because the Hun did an area strafe in front, behind, and around the single gun. Another time the descent of an 8-inch saved the _amour-propre_ of a worried second lieutenant, who, after jockeying with his angle of sight, had got into abject difficulties with his range and corrector. One morning I was up forward carrying out instructions to keep in daily touch with the infantry battalions, finding out their requirements, and discovering what new artillery targets they could suggest. As it was also my business to know what the Heavies were doing, I stopped at an O.P. in a trench to ask a very young R.G.A. officer observing for a 6-inch how. such questions as what he had fired upon that morning, and whether he had noted any fresh Boche movement. I had passed along the winding trench and descended the dug-out headquarters of one of our infantry battalions, and was inquiring if the commanding officer had any suggestions or complaints to make, when the boyish R.G.A. officer came down the steps and, not noticing me in the dim candle-light, asked in hurried tones: "Excuse me, sir, but could you identify an artillery officer who said he was coming here? He stopped and asked me some extraordinary questions ... and"--hesitatingly--"you have to be careful talking to people in the front line." The adjutant and the intelligence officer of the infantry battalion were smiling broadly. Finally the colonel had to laugh. "Yes," he said, "I can identify the artillery officer. Here he is. You haven't discovered a spy this time."