17/12/1917 ST ELIE RIGHT: Lt.-Col. BW VANN MC rejoined from leave and resumed command of the Battalion.

1/6th Battalion War Diary [WO/95/2694]

17/XI/1917: Hostile artillery and TMs unusually quiet. Preparations were completed for firing gas bombs on German trenches from 4″ TMs on the first night that the wind is favourable.

139 Infantry Brigade: Headquarters War Diary [WO95/2692]