No record in the 1/6th Battalion War Diary [WO/95/2694]

9/XII/1917: Hostile artillery active on right subsection during morning. During the night a patrol of 8th Sherwood Foresters under 2/LT WH SUTTON entered German front line in G11b and proceeded along it for 100 yards without encountering the enemy. Traces of recent patrolling of this trench by the enemy were found. Orders for raid by 5th Sherwood Foresters were sent out.

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

305800 L/Cpl Arthur Dean was killed in action aged 22

Son of Mr. R. Dean of the Crossing, Winthorpe, Newark, Nottinghamshire

Enlisted in the Sherwood Foresters just after the war broke out and went across to France in Aug. 1915. He returned to England in March suffering from trench foot and septic poisoning. Going out again in July. While in charge of a Lewis gun, he was struck by fragments from an enemy winged bomb (trench mortar). He did not complain and passed away while being carried down the line.

See here and here