Cyril Falls, The History of the 36th (Ulster…
“ If both could not be accomplished, the artillery covering the front of assault should be strengthened at the expense of counter-battery groups. The creeping barrage, he suggested, might be slightly reduced to one 18-pounder per twenty-five yards, and augmented by a sweeping barrage, concentrated to cover about ten yards a gun, each group sweeping right and left along the front allotted to it, with a higher burst and greater searching effect upon shell-holes. The pace of the creeping barrage must be reduced, and there must be more frequent pauses. ”
