Source: S581 Find a Grave, database and images (https://www.findagrave.com/memorial/120214556/john-devereux-dennis: accessed 07 May 2023), memorial page for John Devereux Dennis (10 Nov 1836–10 Sep 1910), Find a Grave Memorial ID 120214556, citing Pine Grove Cemetery, Lynn, Essex County, Massachusetts, USA; Maintained by Alexis Currier (contributor 47424643).
Source: S6301 Internet (www.familysearch.org) Massachusetts, Deaths, 1841-1915
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