Complex sentence: In August 1921 and 1922, Gurdjieff traveled around western Europe, lecturing and giving demonstrations of his work in various cities such as Berlin and London and capturing the allegiance of Ouspensky's many prominent pupils (notably the editor A. R. Orage).
Split into simpler sentences: In August 1921 and 1922, Gurdjieff traveled around western Europe, lecturing and giving demonstrations of his work in various cities, such as Berlin and London. He attracted the allegiance of Ouspensky's many prominent pupils (notably the editor A. R. Orage).