Samuel died 1 MAY 1723 at Boston, Norfolk, Massachusetts
Samuel was burial 1723 Ledyard, N. Groton, New London, CT. "He is buried about a mile northwest of Seth Williams' farm in Ledyard, on the farm of C.H. Stanton." (Ohler) Find A Grave: Memorial #62175748 states he is buried in Avery-Morgan Burial Ground with his wife, gravestone picture included. 
Susannah died on 2 OCT 1747 in Groton, New London, Connecticut. 
She is buried in Avery-Morgan Burial Ground, Groton, New London, Connecticut 
Note, removed Susan Palmer-22 as a wife.
Note: The following information appears on p. 115 of The Groton Avery Clan pertaining to the children of this Samuel Avery:
This list corresponds to the one printed by Mr. Sweet [The Averys of Groton], with one exception. The "John" given by him is omitted. All the other children are found recorded on the Groton books, but there is no "John " among them. Mr. Sweet himself was in doubt in regard to the matter. Investigation shows that the John mentioned by Mr. Sweet belongs to the line known as the Thomas Avery line of Portsmouth, N. H. (see p. 24), and that he and all of his descendants must be transferred to that clan.
On the basis of this information, as well as the same error captured by other editors of the [Avery-32] profile, it has herewith been detached from these parents.[JRF]
↑ Richardson, Douglas. 'Magna Carta Ancestry: A Study in Colonial and Medieval Families. 4 vols, ed. Kimball G. Everingham. 2nd edition. Salt Lake City: the author, 2011. Vol. IV, p. 330.
↑ Clara May Paine Ohler. Ancestors and Descendants of Captain John James and Esther Denison of Preston, Connecticut (Lima, Ohio, 1912), p. 181, Internet Archive
↑ Find a Grave, database and images ( accessed 23 August 2020), memorial page for CPT Samuell Avery (14 Aug 1664–1 May 1723), Find A Grave: Memorial #62175748, citing Avery-Morgan Burial Ground, Groton, New London County, Connecticut, USA ; Maintained by Bradley Moody (contributor 47097169) Gravestone picture
↑ Find a Grave, database and images (accessed 29 July 2020), memorial page for Susanna Palmes Avery (1665–2 Oct 1747), Find A Grave: Memorial #70822502, citing Avery-Morgan Burial Ground, Groton, New London County, Connecticut, USA ; Maintained by David Leighr (contributor 47748900)
Bradley Moody on 10 Aug 2020
RE: Samuel Avery tombstone picture
You may do so. Are you descendant from Samuel? I am working adding info in my own wikitree. My profile is at https://www.wikitree.com/wiki/Moody-6078
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It may be possible to confirm family relationships with Samuel by comparing test results with other carriers of his Y-chromosome or his mother's mitochondrial DNA.
However, there are no known yDNA or mtDNA test-takers in his direct paternal or maternal line.
It is likely that these autosomal DNA test-takers will share some percentage of DNA with Samuel: