Walter and Frank (Blacksmith) are in Bridgetown 1907 List of Occupations, but not residing on the same street. http://www.gov.ns.ca/nsarm/virtual/directory/
Cannot find them in the 1911 census which is the latest.
In the 1901 Census Frank is with an Ann Doucett, age 75 who likely is the same lady in the 1891 Census but I can't find any marriage for a Fowler to a Doucett during that ten year period. Also I question her age.
Neither Frank or Ann are in Annapolis Cemetery search, but maybe they don't have headstones.
No Fowlers Walters age in the Maine 1880 Census or the NS 1881 Census. Maybe a Museum in Annapolis or Bridgetown would have info, such as from newspapers of 1900 to 1910.
Our local Museum records info on individuals and has it on a small file card.
Cheers and good luck.