Long before the Somme Battle, the exigencies of trench warfare had altered the original organization of army corps. The corps had ceased to be a unit composed of specific divisions, and divisions were no longer affiliated permanently to one corps, but moved at frequent intervals from quiet sectors to active ones to take part in an offensive, and after a short period of heavy losses and extreme exertion would be again withdrawn to another quiet sector or a training area for rest, recruitment, and refit. Therefore, on a front like the Somme, a continuous stream of divisions passed through the corps, each taking its share of the fighting and being in turn relieved. As the Corps Signal Company, like the brook, “went on for ever,” it had to fit each fresh division into the frame of the existing communications as they chanced to stand at the moment, and assist the divisional signals to pick up and utilize the available lines. The organization had, also, to be elastic enough to meet the requirements of administering anything from two to seven divisions simultaneously. During the Somme, nineteen different divisions passed through the XV. Corps, and as many of them went through the furnace more than once, there were altogether fifty-three divisional changes. What work this involved to the Corps Signal Company in the transferring of lines, the directing of traffic, the continuous alteration of records, and the supply of material can be readily imagined. The excellence of the work of the B.E. Section with the Heavy Artillery was recognized in a communication addressed to Major Harrison, in which the Corps commander stated that he much appreciated the work done by Lieutenant Ross and his party, and considered that the work of this section was typical of the whole South African Signal Company. When General Horne himself left the Corps at a later date, to take command of the First Army, he had evidently seen no reason to alter his opinion of the Company, for in taking leave of the A.D.A.S. he congratulated him on commanding a unit second to none in France.