The rout surged over the canal, and the roads to the west were choked with broken infantry and galloping gun teams lacking their guns. Most of the French were coloured troops from Africa, and in the early darkness they stumbled upon the Canadian reserve battalions. With amazement the Canadians saw the wild dark faces, the heaving chests, and the lips speechless with agony. Then they too sniffed something in the breeze—something which caught at their throats and affected them with a deadly sickness. [Illustration: The Second Battle of Ypres.] The immediate result of the stampede was a 5-mile breach in the Allied line. The remnants of the French troops were thrown back on the canal, where they were being pushed across by the German attack, and between them and the left of the Canadians were five miles of undefended country. Through this gap the enemy was pouring, preceded by the poisonous fumes of the gas, and supported by heavy artillery fire. The Canadian front was held at the moment by the 3rd Brigade under General Turner on the left and the 2nd Brigade under General Currie on the right. The 1st Brigade was in reserve. The 3rd Brigade, on which the chief blow fell, had suffered from the gas, but to a less degree than the French. With his flank exposed General Turner was forced to draw back his left wing. Under the pressure of the four German divisions the brigade bent backwards till its left rested on the wood east of the hamlet of St. Julien. Beyond it, however, there was still a gap, and the Germans were working round its flank. In that wood there was a battery of British guns, and the Canadians counter-attacked to save the guns and find some point of defence for their endangered flank. Assisted by two battalions from the 1st Brigade they carried the wood. A wilder struggle has rarely been seen than the battle of that April night. The British reserves at Ypres, shelled out of the town, marched to the sound of the firing, with the strange sickly odour of the gas blowing down upon them. The roads were congested with the usual supply trains for our troops in the Salient. All along our front the cannonade was severe, while the Canadian left, bent back almost at right angles, was struggling to entrench itself under cover of counter-attacks. In some cases they found French reserve trenches to occupy, but more often they had to dig themselves in where they could. The right of the German assault was already in several places beyond the canal. The Canadians were for the most part citizen soldiers without previous experience of battle. Among their officers were men from every kind of occupation—lawyers, professors, lumbermen, ranchers, merchants. To their eternal honour they did not break. Overwhelmed by superior numbers of men and guns, and sick to death with the poisonous fumes, they did all that men could do to stem the tide. All night long with an exposed flank they maintained the gossamer line of the British front.