Name, date and place of birth, date and place of death, added here in April 2022, and from a post written by Brian Brandon about 'James George Cox' on "The First Four Ships" website:
http://www.firstfourships.co.nz/pics/othrppl.php?table=others&id=56
Brian Brandon is a x2 great-grandson of James George Cox, and being descendant through James' son, James George Coleridge Cox.
Brian of nzolivers is also a x2 great-grandson of James George Cox, but descendant through James' daughter Elizabeth Annie Cox.

Result from birth search on New Zealand BDM website in April 2022:
1852/3860. Cox, James George Coleridge. Mother: Louisa. Father: James George

Full date of birth of 28 May 1852 confirmed from further searching in April 2022 on BDM Search by incrementally changing the date range for the birth.

Year and country of marriage from search on New Zealand BDM website in April 2022:
1876/1719. Bride: Ann Nicholls. Groom: James George Coleridge Cox

Full date of marriage of 9 August 1876 from further searching in April 2022 on BDM Search by incrementally changing the date range for the marriage.

Year and country of death, from death search on New Zealand BDM website in April 2022:
1918/3430. Cox, James George Coleridge. Died age 66Y

Full date of death of 4 May 1918 confirmed from further searching in April 2022 on BDM Search by incrementally changing the date range for the death.

New Zealand Electoral Roll - Wairarapa Roll for 1873/74
Cox, James George Coleridge, Mataikona, household, Mataikona, house
Cox, James George, Place of Abode: Featherston. Qualification: (1) freehold, Featherston town sections Nos 308, 312; (2) leasehold, Mataikona 5000 acres [Father]

New Zealand Electoral Roll - Masterton Roll for 1890
Cox, James George Coleridge, residential, Te Mai, settler
Cox, James George, Qualification: freehold; Residence: Featherston; Occupation: settler; Qualification: Mataikona, known as Te Mai, 600 acres [Father]

New Zealand Electoral Roll - Masterton Roll for 1893
Cox, James George Coleridge, Te Mai, settler, residential
Cox, James George, Te Mai Place of Abode: Featherston; Occupation: settler; Qualification: freehold; Mataikona, known as Te Mai, 600 acres [Father]
Cox, Thomas William, Te Mai, settler, residential [Brother]