John died before 1851 in Wilby, Suffolk, England, United Kingdom aged ~55.
Research Notes
There was another John Harding who married a woman named Lydia, and they lived in Ipswich, Suffolk. I would be careful not to confuse the 2
I searched the GRO index and could not find a death registered under the name Harden, Hardin or Harding. His wife was listed as a widow in the 1851 census.
Sources
"England and Wales Census, 1841," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:M73C-971 : 25 May 2019), John Harden, Wilby, Suffolk, England, United Kingdom; from "1841 England, Scotland and Wales census," database and images, findmypast (http://www.findmypast.com : n.d.); citing PRO HO 107, The National Archives, Kew, Surrey.
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