After a week’s rest it returned to Ypres, and was employed on nightly fatigues, carrying wood for mining parties and wiring the support lines. On the night of the 16th it returned to the trenches from Duke Street to Roulers railway, and came in for a good deal of shelling, chiefly behind the lines. The usual work was continued, but forty yards of the line had been completely blown in, and accordingly the trench had to be re-dug. On the 21st the Battalion returned to Poperinghe after having been relieved by the 10th Battalion Rifle Brigade, and marched to Camp N, where it remained till the end of the month. [Sidenote: June.] On June 1 the 2nd Guards Brigade proceeded to Volckerinchove, where it marched past Lieut.-General Lord Cavan, the Corps Commander, and Major-General G. Feilding, the Divisional Commander. In order to try a new method of attack, a complete representation to scale of the German trenches revetted with sand-bags was constructed, while the British line was also roughly indicated. The assault on the German trenches was then practised on the following lines: the assault was to take place in five waves, the fifth wave being a carrying company, provided by a battalion other than the actual assaulting battalion. The two leading companies were to assault in two waves, the second following about fifty yards in rear of the first. These two waves were to cross the German front-line trench without getting into it, and push on to the objective, roughly speaking, the German third line. The third wave was to pass over the German front line and take the German second line, which was to be consolidated. The fourth wave was to take and consolidate the German front line. Strong bombing parties were to be placed on both flanks of all companies, with centre bombing parties dispersed roughly opposite the German communication trenches. Bombing parties of the two leading waves were to establish blocks in the German communication trenches, while the bombing parties of the rear waves were to clear the communication trenches forward and get into touch with the two leading waves. All the men were to carry two Mills grenades and four sand-bags, tucked through the web equipment in front, and every third man was to carry a shovel slung. The R.E. material and trench-mortar ammunition was to be carried by the fifth wave. At night the men were to carry Roman candles to show the position of the waves. All the battalions in the Brigade carried out this form of attack, and when they had mastered the new features it was practised by the Brigade.