The importance of the Canadian fight during that first twenty-four hours was out of all ratio to the size of our forces. The whole success of the battle hinged on the attack by two battalions on the morning of the 23rd of April. These two battalions were sent up into the centre of the gap left in the line by the retreat of the French colonials. Supported by four field guns, they advanced steadily under a terrific fire from the enemy. As General Mercer said to me afterwards, it was, according to the book, probably as crazy a bit of military tactics as could possibly have been tried, but the very daring of the attempt proved its success. The Germans, believing that such a counter attack must be backed up by much stronger forces, hesitated to come on and the day was saved, for while they hesitated and made sure of their ground, troops were hurried up from other parts of the line and the Huns had missed their chance. That first night if the Germans had simply walked ahead they would have found nothing to stop them, but they were too much dazed with their own success to realize the situation and take advantage of it. Naturally we were thrilled with pride at the success of the division; we had been present at its birth; we had watched it through the various vicissitudes of its eventful career; and now its great opportunity had come. Now its name had been indelibly written on the scroll of fame. It had saved the situation in one of the most critical happenings of the whole war. The next day the General of the fourth corps, accompanied by his staff, paid a visit to our laboratory, and the General told us that the Germans had tried their gases on the Belgians the very day after they had gassed the French and Canadian colonial troops. But the Belgians breathed through wet handkerchiefs till the gas had passed over, and when the Germans came on, full of confidence in the efficacy of their deadly new weapon, the Belgians gave them a severe punishing. On April 27th the three of us started out after 5 o'clock to the Canadian area in search of news. The military policeman on the road at the outskirts of Poperinge on being queried said, "All right, no shells to-day in Pop." But we got only about 150 yards into the town when there was a terrific hair-raising explosion near us, followed by showers of bricks and bits of whizzing shell. It was a shell of very high calibre, and as we passed the next cross street and looked up it, we could see four houses settling into dust and a few people running towards the spot. A telephone wire cut by a flying fragment fell upon a car just ahead of us. It looked funny to see the doors of the houses along the street belch forth their inmates who rushed to the shutters, banged them to, rushed in again and no doubt hid themselves in the cellars. It reminded us exactly of the actions of a flock of chickens when a hawk appears in the sky.