Walter Lee Cobb b.10 May 1874, Vasselboro, Kennebec, Maine
William M. Cobb b 1 Aug 1849, Eddington, Penobscot, Maine
Laura Ella Wood b Jun 1852, Vasaselboro, Kennebec, Maine
May C. Bowman(born Carrie May Worthing), b abt 1877, Hallowell, Kennebec, Maine
Marion Evelyn Cobb, b 9 May 1901, Calais, Washington, Maine d Feb 1981, Bangor, Penobscot, Naine
Norman E. Cobb b 18 Jul 1902, Calais, Washington, Maine d 19 Sept 1975, Belfast, Waldo, Maine
Walter Lee Cobb is my Mother's grandfather. My tree is missing a lot of death dates and I'm trying to find where to look. I have records for Walter being alive out until 1940. My mother remembers that her grandparents used to go to New York all the time and she was born in 1946. I have Census' from 1880-1930. 1930 shows Hallowell, Kennebec, Maine as residence. I have done searches on Ancestry, familysearch, mainegeneaology, and am having no luck with a lot of deaths.
Is there a source for deaths that is known that I'm missing?