No record in the War Diary [WO/95/2694]
19th: Battalions working on the trenches and at various works required by the Division.
20th: Battns still engaged in working on Trenches and preparing them for the coming operation.
21st: This work chiefly consists in improving CTs & making extra accommodation for storing ammunition & RE material.
139 Infantry Brigade: Headquarters War Diary [WO95/2692]