Name from birth search of son on New Zealand BDM website in July 2020:
Reg. 1888/1613. Corkill, James Cullen. Mother: Margaret. Father: William

Year and country of marriage from search on New Zealand BDM website in July 2020:
1887/2188. Bride: Margaret Cullen. Groom: William Corkill

Full date of marriage of 14 February 1887 from further searching in July 2020 on BDM Search by incrementally changing the date range for the marriage.