Source A: From a letter written by a Royal Army Medical Corps officer serving at a casualty clearing station near Ypres, May 1915. He is describing the first large-scale chlorine attack and the casualties he treated.
"The gas came over in a greenish cloud that rolled down the enemy trenches and into ours. Men arrived coughing and with foam at their mouths. We used whatever cloths we could get at first, but many needed to be sent back to hospital for serious breathing trouble. We had no special wards yet, and the smell lingered in tents for days."
Source B: From the diary of a British infantryman who witnessed a later gas bombardment near the Somme, March 1917.
"At dawn they released a strange smell and a man next to me went blind, his eyes streaming. The officers gave out small leather cups with a mouthpiece and straps, and the men who could still move helped carry the worst cases to the aid post. Some were sent back in wagons for more treatment."
How useful are Sources A and B for an enquiry into the immediate medical response to gas attacks on the Western Front?
(Total for Question 13 is 8 marks)