The enemy's Headquarters Staff is clearly troubled by the successes gained by our troops during these first days of the battle of Arras, and all attempts to repair the damage to his defensive positions upon which his future safety depends have been feeble and irresolute. It is certain that he desired to make a heavy counter-attack upon the northern edge of the Vimy Ridge. Prisoners taken yesterday all believed that this would be done without delay. The 5th Grenadiers of the Prussian Guards Reserve were hurriedly brought up to relieve or support the Bavarian troops, who had suffered frightfully, and massed in a wood, called the Bois d'Hirondelle, or Swallows' Wood, in order to steal through another little wood called Bois-en-Hache to a hill known by us as the Pimple, and so on to recapture Hill 145, taken by the Canadians on Monday night after heavy and costly fighting. This scheme broke down utterly. Swallows' Wood was heavily bombed by our aeroplanes, so that the massed Prussians had an ugly time there, and yesterday morning Canadian troops made a sudden assault upon the Pimple, which is a knoll slightly lower than Hill 145, to its right, and gained it in spite of fierce machine-gun fire from the garrison, who defended themselves stubbornly until they were killed or captured. At the same time Bois-en-Hache, which stands on rising ground across the little valley of the River Souchez, was attacked with great courage by the 24th Division, and the enemy driven out. It was difficult work for our infantry and gunners. The ground was a bog of shell-craters and mud, and there was a blizzard of snowflakes. The attack was made with a kind of instinct, backed with luck. Our men stumbled forward in a wake of snow-squalls and shells, fell into shell-holes, climbed out again, and by some skill of their own kept their bombs and rifles dry. Machine-gun bullets whipped the ground about them. Some fell and were buried in snow-drifts; others went on and reached their goal, and in a white blizzard routed out the enemy and his machine-guns. It was an hour or two later that German officers, directing operations at a distance and preparing a counter-attack on the Vimy Ridge, heard that the Pimple and Bois-en-Hache had both gone--the only places which gave observation on the south side of Vimy and made effective any attack. Their curses must have been deep and full when that message came over the telephone wires. They ordered their batteries to fire continuously on those two places, but they remain ours, and our troops have endured intense barrage-fire without losing ground. Now we have full and absolute observation over Vimy Ridge to the enemy's side of the country reversing all the past history of this position, and we are making full and deadly use of it. The enemy still clings to Vimy village on the other side of the slopes, and to the line of railway on the eastern side of Farbus, but it is an insecure tenure, and our guns