Regarding Jessie's census entries, 1841 and 1851 are included in reply #21.
1861:
Alexander Robb 60 Rail Labourer, b. Midmar, Aberdeen
Jessie Robb 47 b. Ednr, Edinburghshire
Ann Robb 14
Catharine Robb 11
William Robb 7
Address: Kirkton Street East Side, Mortlach, Banff
And 1871, before Jessie's death in 1876:
Alexander Robb 65 labourer b. Midmar, aberdeensh
Jessie Robb 57 b. Fyvie, aberdeensh
Catherine Robb 21
Elspet Mcconnachie 11 grandchild
John Mcconnachie 9 grandchild
John Stuart 8 grandchild
Alexa Reid 3 grandchild
George Robson 2 grandchild
Address: Church Street, Mortlach Banff
Monica