laura,company serjeant major dyson wrote to lance serjeant harvey brooks parents when he was killed,they lived at 74 turner lane ashton,it might be worth a request in the tameside reporter to see if any descendants of serjeant brooks still live there,CSM dyson and jack ashtons names are in a list i have,of men who had volunteered in sept/nov 1914,along with 600 others,your gt grandfather was a CSM in oct 1917,and he would have been only 21 at the time,thats young for a CSM,i think he was in line for the regimental serjeant majors position but young john,w peagram got it,he was only 20,he enlisted at the same time as your gt grandfather,and went on to win the DCM for gallantry,mack