My chief business as intelligence officer was to keep an eye on Fritz and find out what he was up to. I had a squad of trained observers who were posted in certain vantage-points called O. Pips (O. P.--Observation Post). These O. Pips were mostly on top of tall trees or the top of some old ruined farmhouse. From these "pozzies" (positions) a good deal of the country behind the enemy lines could be seen, and the observers, who were given frequent reliefs so that they would not become stale, had their eyes glued to it through a telescope. Every single thing that happened was written down, including the velocity and direction of the wind; the information from all these and other sources being summarized by myself into a daily report for G. H. Q. There was one O. Pip on top of a crazy ruin that was used for many months without the Germans suspecting. It really hardly looked as if it would support the weight of a sparrow. I used to wonder oftentimes how I was going to get up there, and then by force of habit would find myself lying alongside the observer sheltering behind two or three bricks. From this pozzie one of my boys saw a German Staff car pass Crucifix Corner. This was a stretch of a hundred yards of road which we could plainly see where a crucifix was standing, though the church that once covered it had been entirely destroyed. The car was judged to contain some officers of very high rank, both from the style of the car and the colors of the uniforms. When I got this information I prepared to make that road unhealthy in case they should return. I called up our sniping battery, and got them to range a shell to be sure they would not miss. At five o'clock in the afternoon my waiting was rewarded, and just by the pressing of a button eight shells landed on that car, and sent its occupants "down to the fatherland." We received news about that time that one of the Kaiser's sons was killed, and though it was denied later, in my dreams I often fancy that he might have been in that car. There was a landmark behind the German lines in this sector known as "the hole in the wall." It was marked on all our maps used by the artillery for ranging, and was the object on which we set our zero lines to get bearings of other objects. One day "the hole in the wall" disappeared, and there was much wailing and gnashing of teeth. Did the Germans destroy it or was it the rats that undermined its foundations? I fancy it was like the celebrated "One Horse Shay"--every brick in the wall that surrounded the hole had been wearing away for years, and at the stroke of Fate all crumbled into dust. We were able to do without our old friend, as Fritz very kindly built up in the churchyard at Fromelles a large red earthwork that could be seen for miles, and which our big guns sought unsuccessfully to destroy but made the entrance to it very unhealthy.