Leading up to "Pinney's Ave.," there was a short length of communication-trench very appropriately called "Impertinence Sap," for it was merely a ditch, three feet deep, floored with "duck boards." I could never get the reason why this trench was built. It only afforded protection for one's legs, which is the part of the body one would rather be hit in if one must be hit at all. The goose-flesh always crept around my head when I walked along this sap, for, strange to say, my head seemed to be the most valuable part of me, and at night the machine-gun bullets used to whistle through the low hedge that ran alongside it and frequently struck sparks from the flints on the old road just a yard or two away. I suppose I used that sap two hundred times, always with misgivings, for I have seen more than a score of men punctured along its length.

[Illustration: "Us—Going In".]

All these parts were unhealthy. The Rue de Bois, the street that ran parallel to the firing-trench, about a thousand yards behind the front line, was always under indirect machine-gun fire, yet was, nevertheless, used regularly every night by our transports. It was surprising how few mules were killed. Many times have I skipped, as the bullets struck sparks around my feet.

After a while we got to know that "Fritz" had a regular cut-and-dried system in the shelling of these trenches. He always took Mine Ave., Brompton Ave., and Pinney's Ave. alternately, and we later on saved a number of lives by having a sentry at the entrance to these communication-trenches to give warning to use the other trench while this one was being shelled. Weeks later I worked out the enemy's bombardment system more thoroughly, and had such notices as this posted: "Pinney's Ave. dangerous on Mondays, 2 to 6 P. M.," "V. C. unhealthy Tuesday afternoons," and so on. I know I saved my own life several times by watching "Fritz's" times and seasons. I am quite sure that each battery "over yonder" had a book that laid down a certain number of rounds to be fired at a certain range on Mondays, and so on for every day in the week. And every relieving battery would take over this "book of instructions." Of course there were times when "Fritz" "got the wind up" (lost his nerve), and then he would shell anything indiscriminately. The god of the German is Method, and his goddess System, and it hurt his gunners sorely when we tried something new, and made him depart from some long-predevised plan.

However, these were discoveries of a later date than the battle which wiped out about 70 per cent of our strength.

We had not been two days in the trenches before we knew that we were destined for an attack on the trenches opposite, and we had not had time even to know the way about our own lines. Few of us had even had a glimpse of No Man's Land, or sight of the fellow across the street whom we were to fight.

Our guns immediately began to get busy. In fact, too busy for our liking, for they had not yet got the correct range. This was before the days of total aeroplane supremacy, and the battery commander in those days had not an observer flying above where his shells were falling, informing him of the slightest error.

At any rate, we soon began to discover that the shells that were bursting among us were many of them coming from behind. This made us very uncomfortable, for we were not protected against our own artillery-fire; and accidents will sometimes happen, do what you can to avoid them. Our first message over the 'phone was very polite. "We preferred to be killed by the Germans, thank you," was all we said to the battery commander. But as his remarks continued to come to us through the air, accompanied by a charge of explosive, and two of our officers being killed, our next message was worded very differently, and we told him that "if he fired again we would turn the machine-guns on to them." I was sent back to make sure that he got the message. I took the precaution to take back with me one of his "duds" (unexploded shells) as evidence. At first he told me I was crazy—that we were getting German cross-fire, and that his shells were falling two hundred yards in front of us. I brought out my souvenir, and asked him if he had ever seen that before. He said: "For God's sake, bury it," but I told him it was going to divisional headquarters, and that his little mistake had already cost several lives. This battery did not belong to our division.