As you mention in your previous posting, John Barlow doesn't appear in the crew agreements. The details on the two Barlows who were on Titanic's crew don't match those of your John Barlow. What is your source that he was on Titanic?
Chris, my mother's great uncle Julius Barlow, brother of John, used to tell my mother when she was a little girl the story with tears in his eyes. Over the years she has forgotten any details. Everyone else in the Barlow family seems to have forgotten or are deceased.