Name from birth search of son on New Zealand BDM website in November 2018:
Registration 1884/2810. Coad, Arthur John. Mother: Mary Ann. Father: John

Year and country of marriage from search on New Zealand BDM website in November 2018:
1878/467. Bride: Mary Ann Denby. Groom: John Coad

Full date of marriage of 2 January 1878 from further searching in November 2018 on BDM Search by incrementally changing the date range for the marriage.