Men lying all along the side of the road between Poperinghe and Ypres, exhausted, gasping, frothing yellow mucus from their mouths, their faces blue and distressed. It was dreadful, and so little could be done for them. I have seen no description in any book or paper that exaggerated or even approached in realization of the horror, the awfulness of these gassed cases. One came away from seeing or treating them longing to be able to go straight away at the Germans and to throttle them, to pay them out in some sort of way for their devilishness. Better for a sudden death than this awful agony.
~G.W.G Hughes from an autobiograhical sketch (never published), IWM