Was the London Buddhist Society the first Western Sangha? Christmas Humphreys founded the London Buddhist society in 1924. Would this have been the first sangha in the West? Wikipedia says of it


  The Buddhist Society of London is one of the oldest Buddhist
  organisations outside Asia


So were there other groups of western born Buddhists practicing together even earlier than this or would this truly have been the first such grouping?

For the sake of this question I am taking sangha to mean any sort of Buddhist community. I appreciate it often refers specifically to a monastic community however I want to use a broader definition here.
I am not sure if this fits your definition but the Pali Text Society was older.