I'm not altogether sure we're looking for the same person. The Maurice McWalter in my tree had 2 male children - Thomas (my great Grandfather), who lived in Tyldesley, and John William McWalter, who lived in Swinton in 1911. Neither, to my knowledge, had a son called Arthur.
However, I would be very pleased to look at your file and see how it matches mine. My email address is email@example.com