Typescript copy of a letter from WSC to the Prime Minister [Herbert Asquith] agreeing with Colonel [Maurice] Hankey's comments on "special mechanical devices for taking trenches"; describing the impact of trench warfare on military theory and weapons; urging the deployment of steam tractors equipped with armoured shelters, trials of "shields on wheels", systematic use of artificial smoke, and stressing the importance of swift development and production of new weapons. Unsigned annotated with filing note "Tanks".