Rev. John Dumbell's bio, with photo, is listed in the Cyclopedia of New Zealand (Wellington District)
www.nzetc.org/tm/scholarly/tei-Cyc01Cycl-t1-body-d4-d22-d47.html

He, and his wife, Ellen, are buried in Karori Cemetery in Wellington, NZ
freepages.genealogy.rootsweb.ancestry.com/~ourstuff/KarorCem.htm
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Dumbell Rev. John-8 Sept. 1923--B. 12 Feb. 1830
Dumbell Ellen-------6 June 1903--B. 5 June 183?
Wife of Rev. John Dumbell

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Not related, just trying to help.