Letter from T. Walsh, H.Q. 15th Bn. Tank Corps, to Pte. Foster, detailing the author's experience of being Mustard Gassed and blind for 10 days, and enquiring about Pte. Fosters wound. Pte. 200816 William Ernest Foster, D Coy. Heavy Section, Machine Gun Corps (later D Bn. Heavy Branch, Machine Gun Corps and 4th Bn. Tank Corps), served originally in the Machine Gun Corps (Motors).