Got the family now in 1881 and 1891.
Starting with the 1891 entry in Dundee, after John and Catherine's marriage in 1886:
ROBERTSON John, 44, tailor, b. Forgue Aberdeenshire
ROBERTSON Catherine, 32, b. xxx (spl) Aberdeenshire
ROBERTSON Mary, 15, mill worker, b. Strichen Aberdeenshire
ROBERTSON Bella, 13, b. Strichen Aberdeenshire
ROBERTSON Maggie, 11, b. Strichen Aberdeenshire
ROBERTSON Kate, 2, b. Aberdeen
ROBERTSON Tina, 5mths. b. Dundee
Now, with the additional childrens' names, the family with Maggie's mother in 1881:
ROBERTSON John, 35, Photographic Artist, b. Forgue
ROBERTSON Mary, 33, b. Ellon
ROBERTSON John, 10 b. Peterhead
ROBERTSON Alexander, 8, b. Strichen
ROBERTSON Mary, 5, b. Strichen
ROBERTSON Isabella, 4, b. Strichen
ROBERTSON Maggie, 2, b. Strichen
ROBERTSON Ann, 11 mths b. Banchory Devenich, Kincardine
Census in Banchory Dvk, Kincardine
This is John and Mary GREIG's marriage from IGI:
JOHN ROBERTSON Marriages: Spouse: MARY GREIG
Marriage: 25 AUG 1865 Ellon, Aberdeen, Scotland
Mary GREIG died in 1882 at the age of 33 due to heart problems in Old Marchar, Aberdeen. Husband John (still a photographer!) reported the death. Father James Greig and mother Agnes (can't make out maiden name) both deceased.
I've also checked births for the three girls born in Strichen and they all match the details we have, John Robertson Photographer and Mary Greig married in 1865, as shown above.
1. Mary Agnes Robertson b. 1876 in Strichen (Agnes the name of Mary's mother)
2. Isabella Pirie Robertson b. 1877 in Strichen
3. Maggie Jane Cruickshank Robertson b. 1879 in Strichen (in his 1886 marriage cert. John's mother is Jane Cruickshank).
So that's it, it all fits...........except for one thing, why did John change from photographer to tailor...........no idea!
Regards.
Monica