Found these two weddings, but not to Mary Holcombe.
Australian and New Zealand Gazette; Sat. 4/7/1868
London, Middlesex, United Kingdom.
April 29th, at Christchurch, Mr. Willam Farquharson, late of Aberdeenshire, Scotland, to Miss Jane Gillian, of Meghroney, Antrim, Ireland.
1862;
Charles, 3rd son of William Farquharson, late of Aberdeenshire, Scotland, to Margaret, 2nd dtr of William Hanlon esq, Kilkenny Ireland.
Jack