He achieved notoriety in 1909 as the initially anonymous author of the play An Englishman's Home.[7][8][9] The play tells the story of the Brown family caught up in the invasion of Britain by a foreign power identified as "Nearland"[10] but widely assumed to represent Germany.[11] When the play was staged in Germany, it caused an outrage, as the German press saw clear references to their homeland. In 1940 it was made into a propaganda film, more pointedly titled "Mad Men of Europe".[12]
At the death of his sister Sylvia, and as requested in her will, he became co-guardian to the Llewelyn Davies boys who inspired Peter Pan.[13] He served for the last time in World War I, being killed in action in Flanders in 1915.[14]J. M. Barrie wrote to Guy's nephew George Llewelyn Davies to inform him of the death; by the time Barrie received his response, George himself had been killed.[15]
