Hello Rangitoto.
David Burnie ALLISON, b:1838, Newton Stewart, Penninghame, and Helen PATERSON, b:1840, Newton Stewart, Penninghame, were married on 22 Sep 1864, at St. Margaret Church, York , - enroute to Bombay, New Zealand.
My husband is descended from their daughter, Mary Helen Hughan ALLISON b: 1873, Bombay N.Z. died 1921, married James ROGERS, in 1896 at Bombay, N.Z. Mary Helen is Jessie Isabella's younger sister.
I am only too happy to share a copy of David ALLISON and Helen PATERSON's marriage cert if you wish to contact me.
Regards
V (Auckland, New Zealand)