The weather, combined with the constant work on trench construction and the continual mine explosions and bombardments, proved very wearing to the men. At this period, with all three brigades employed in holding the line, the men were in the trench area for twenty-one days and at rest only for seven every month. The result was that, when the Division was ordered to the Somme, they had, owing to the constant strain, become thoroughly tired and stale. Indeed, in the Labyrinth and Neuville St Vaast sectors, trench warfare, as far as the Highland Division was concerned, reached its zenith of intensity. A great effort was required from all ranks, first to reduce the superiority which the enemy had established, later to reduce the balance so that the superiority gradually passed to the British. There was no feature in trench warfare in which, during the period immediately following the relief of the French, the enemy did not hold the advantage. The mining situation, the sniping, the absence of dug-outs, all produced acute problems which demanded immediate solution if disaster were to be avoided. His observation of our lines in this sector was probably unparalleled in the British zone. He employed in large numbers rifle grenades and trench-mortars of every calibre with astonishing accuracy. Finally, he added to the troops an additional embarrassment by his capture of the Vimy Ridge. The enemy, the 2nd Guards Reserve Division, proved themselves throughout worthy opponents, ready and eager to profit by any weakness displayed opposite to them. This Division is remembered for an act of courtesy of a kind seldom associated with the German people. A certain Private Robertson of the 5th Seaforth Highlanders was captured in a sap-head after having made a gallant attempt to defend himself, in spite of a fractured skull. The following day a number of undetonated rifle grenades were fired into the British lines stating in English that the gallant soldier Private Robertson, Seaforth Highlanders, had died of his wounds and had been buried with full military honours in the cemetery at Rouvroy. In spite of the strength of the opposition the men showed excellent spirit throughout, having carried out many good raids, and having repulsed with losses numerous hostile raids, nor was a square yard of ground lost. On Saturday, 24th June, an intense bombardment started at some distance to the south, and lasted throughout the day and night. This was the opening of the preliminary bombardment of the great Somme offensive. It continued incessantly until 1st July, when the attack was launched. Rumours of every kind began to circulate round the trenches, and much speculation arose as to whether and when the Division would be given an opportunity of taking part in the battle.