Hi Malcolm
I know you posted this some time ago but have just came across it.
Catherine Morgan b26 Apr 1815 Canterbury, Kent, England.
She married Rev Harcourt 5 Jan 1850, at the parish Church of Killinkere, Co Cavan, Ireland.
Re the IGI + records of their marriage in Dec 1849, they may have had both a civil and religious ceremony?

Catherine was the daughter of John and Mary Morgan nee Glancy. John was from Bailieborough, Co Cavan, Ireland, and joined the British army in 1807. He was stationed at various posts throughout Europe (incl Canada) in his 30 yr service, and their children were born at various places. At this stage I have no information of Mary's birthplace.
Information sourced from John's service record, as well as research by family members.
Catherine's youngest brother Richard was my gggrandfather, who migrated to Australia in 1853.
Regards
Ashe
New South Wales Australia