'Operations Gravenstafel 1st October to 5th October 1917. For conspicuous gallantry and devotion to duty. On the night of September 30th and October 1st, Sergeant Bigham was in command of a Platoon detailed to push forward and dig Assembly Trenches in advance of our forward Posts. Notwithstanding the fact that the ground was held by enemy posts, he pushed them back and carried out his task with great skill. On one occasion he was determinedly attacked by the enemy but owing to his careful disposition in pushing forward covering parties in shell holes, the attack was broken up. He constantly kept his Company Commander informed of the situation by correct and concise reports. The whole operation was directed by Sergeant Bigham with great skill and coolness and the new line was held despite subsequent heavy shell fire.'
Source: London Gazette
Date: 17 December 1917