The whole country-side was further littered with arms, equipment, clothing, tools, and ammunition. Considerable exertions were therefore required to save even a portion of the serviceable stores which had been left on the ground during the preceding operations. On 30th May the Division was transferred to the IVth Corps, being relieved by the Indian Corps. The following day the 153rd Infantry Brigade relieved the Canadians between Festubert and Le Quinque Rue. This sector was subsequently divided, the 152nd Infantry Brigade taking over the line on the left. On 7th June orders were issued from the IVth Corps to attack the enemy's positions about Rue d'Ouvert and Chapelle St Roch and farther south on the morning of the 11th, with the object of gaining ground towards Violaines. Later this attack was postponed until the 15th. On the 12th the operation order for this attack was issued. The objective of the IVth Corps was "the German positions from Chapelle St Roch along the Rue d'Ouvert to L12. "The Canadian Division was to attack on the right and form a defensive flank; the 7th Division was allotted the Chapelle St Roch and the southern end of the Rue d'Ouvert as its objective; and the 51st Division the extreme end. "The actual objective given to the 51st Division were the houses at L11, L12, L13, and K7. At the last-named they were to join hands with the 7th Division. "The 154th Infantry Brigade were detailed for the attack, their right being directed on the south-west corner of the German salient--that is, a point about 150 yards east by south of L8. The left of this attack was to be directed through L9." One section of the 1/1 Highland Field Company, R.E., and "C" Company of the 5th Seaforth Highlanders, were ordered to assemble in the D line towards the left flank, in readiness to construct and occupy a fire-trench between M6 and L12 after that point had been gained. One section 2/2 Highland Field Company, R.E., with two platoons of the 154th Infantry Brigade, were ordered to assemble in B line near the right flank. Their purpose was "to protect the right flank of the attack and to construct a _point d'appui_ on a suitable site between L8 and L10." It was arranged that sufficient infantry bombing parties should be detailed from the bombers of the Division to carry out various tasks, according to the progress made by the assaulting infantry. In these days the bomb commonly used was the Bethune bomb. These were made of cast-iron, and were exploded by means of time-fuses fixed into detonators, with patent lighters attached to the fuse. They were but clumsy and dangerous weapons when compared with the modern Mills bomb. Bombing and its tactics was then an art which could only be acquired by a course of specialist training, which, with the facilities that then existed, lasted a considerable time.