First two given names from birth search of son on New Zealand BDM website in November 2018:
1909/2097. Benton, Gordon Huntly. Mother: Agnes Wilson. Father: John

Maiden name, year and country of marriage from search on New Zealand BDM website in November 2018:
1906/368. Bride: Agnes Wilson Paterson. Groom: John Benton

Full date of marriage of 30 April 1906 from further searching in November 2018 on BDM Search by incrementally changing the date range for the marriage.