Ahh! Thanks Althea.
I've found a marriage (1889) and death for Charles Thomas (1940), but only a Gazette entry for Charles Henry, Plasterer, his Military Call up 1917, and listing on Wellington Electoral Roll for 1919 (so he must have survived the War).
No sign of a birth registered for either of them, yet parents were here in 1859

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Birth Calc for Charles Thomas would be 1869 (from age 71 on death record)
John B