I recall an occasion when we had been forced to retire at one point and get into a communication trench; we were taken aback by the discovery that it was not deep enough. We had to dig ourselves in. That was not a hard matter for the boys who had their entrenching-tools, but I had lost mine, and the only thing left to do was to try rabbit tactics. So I began to dig myself in with my fingers, and I have a distinct recollection of tearing and scooping at the ground like an animal scuttling for shelter. Luckily the ground was soft and yielding, or I should not have had a chance with such poor tools. As it was, my fingers were torn and bleeding long before the digging-in process was completed. I have given you a general understanding of the task that fell to the Canadian Contingent to accomplish; but as I have said, it is not the actual fighting that dwells in one’s memory. We soon settled down to the ordinary ways of war, and took them as a matter of course. While in training in England we had heard and read a good deal about the fighting, and had become accustomed to it; while as for any such discomforts as heavy rain and sodden ground, they did not trouble us. Not even Flanders could give us worse trials of this sort than we had known while wintering on Salisbury Plain. The boys took the fighting and the hardships as part of the day’s work, and there was neither grumbling nor protesting; but that state of things was changed like magic when there was sprung upon us the most cowardly, dastardly, and dirty means of fighting that the world has ever known. This was the use of poison-gas by the Germans--a device which instantly put them out of consideration as civilised combatants, and stamped them for ever as dishonourable soldiers of a dishonoured country. This poison-gas came upon us unseen, insidiously, and without the slightest warning in the one case; and in the other it rolled down upon us literally as a cloud. It is hard to speak calmly of this unprecedented form of warfare, but I will try to tell exactly what happened, and I think I can do that, because when I was a medical student I particularly interested myself in chemistry. It was on Saturday, the 24th, that our Brigade had their first experience of gas. We had been shelling the German trenches all day, and were standing to, expecting an attack by the enemy. We naturally looked for the employment of the usual methods, and were ready to receive the Germans when they showed themselves. We were strongly entrenched, and many a keen eye was kept on the hostile ground, watching for the appearance of the enemy. But not a sight of a German was to be had; there was no commotion, no excitement, no appearance of anything uncanny or uncommon, yet there was coming towards us a German weapon which was neither honest artillery nor small arms--poison-gas.