A marriage of Mary MAHON
MAHON Mary McNey 20y MAHON married HARNEISS Barton 22y 27 Jun 1877 recorded at Kaikorai Presbyterian Church Dunedinhttp://www.presbyterian.org.nz/archives/synodregionmarriages.htm
This appears to be the NZ BDM Index record
1877/1218 Mary Macnee Mahon Barton Harneifs
and these appear to be children of that marriage
1880/16514 Harneiss Robert Mary Barton
1882/8668 Harneiss Kate Gillespie Mary Barton
1886/706 Harneiss James Mary Barton1888/12304 Harneiss Mary Hughan Mary Barton
1890/18365 Harneiss George Barton Mary Barton1893/4792 Harneiss David Hughan Mary Barton
1894/15269 Harneiss Olive Lilian Mary Barton
1896/6387 Harneiss Wilhelmina Mary Barton
1899/3517 Harneiss Walter Fraser Sherriffs Mary Barton
1900/15173 Harneiss Jeffery Alexander Mary Barton
The maiden name of Mary MAHON nee HUGHAN [Grandmother of above] seems to tie in Mary HARNEISS nee MAHON [Mother of above ] as a Daughter of Robert & Mary.
Maybe after her unhappy episode with Joseph SCOULLAR Mary settled down next year with Barton HARNEISS ?
That could mean David Hughan MAHON was the missing illegitimate child after all !