That was true. The Canadians made heavy attacks at Lens, some of which I saw from ground beyond Notre Dame de Lorette and the Vimy Ridge and the enemy country by Grenay, when those men besieged a long chain of mining villages which girdled Lens itself, where every house was a machine-gun fort above deep tunnels. I saw them after desperate struggles, covered in clay, parched with thirst, gassed, wounded, but indomitable. Lens was the Troy of the Canadian Corps and the English troops of the First Army, and it was only owing to other battles they were called upon to fight in Flanders that they had to leave it at last uncaptured, for the enemy to escape.