There are several trees on Ancestry. They and Samuel's parents Thomas King 1775-1824 Eliz or Elizabeth McKillop 1782-1871
Marriage DEc. 8, 1820
death for Samuel King abt. 1876 Quincy Ma.
they all have this info for his death.
I could not find a death record to match this in vitals for Quincy. I have NEHGS or American Ancestors.