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- [S11196] 1900 census, Maine, Hancock county.
- [S29480] 1920 census, Maine, Hancock county.
- [S43361] Social Security Applications and Claims Index, Name: Elwyn Wt Hardy [Elwyn W Hardy] Gender: Male Birth Date: 7 Nov 1899 Birth Place: Deer Isle, Maine Death Date: Oct 1989 Claim Date: 2 Oct 1968 (Reliability: 3).
- [S53678] Death index, Maine, Name: Elwyn W Hardy Death Date: 14 Oct 1989 Age: 89 Town: Blue Hill Certificate: 8908260 (Reliability: 3).
- [S8594] Birth, intention of marriage, marriage, and death records of the Town of Deer Isle, Maine, 1758-1940. Original records of.
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