Question: What fictional group created by Arthur Machen protected the British Army during the Battle of Mons?
Sentence (from "Philip Howell"): Howell had been in action on the front line since the start of World War I, serving with the BEF, and commanding the 4th Queen's Own Hussars as Lt. Colonel through The Retreat from Mons, The Battle of Le Cateau, The Marne offensive, Hill 60, and the First Battle of Ypres.
Relevant evidence: No