Blanched,
You may wish to check this marriage as this John Currie appears in my tree as the son of Robert Currie and Agnes Ross.
(Ist son named Robert and 2nd daughter named Agnes Ross Currie)
Elisezebth Higgins
Gender   Female
Marriage Date   04 Jul 1856
Marriage Place   Bridgeton,Glasgow,Lanark,Scotland
FHL Film Number   6035516
Household Members   
Name   Age
Elisezebth Higgins   
John Currie
Birth of elder daughter who married my adopted relative:
Mary Mckimmie Currie
Gender:   Female
Birth Date:   24 Aug 1856
Birth Place:   Bridgeton,Glasgow,Lanark,Scotland
Father:    John Currie
Mother:    Elizabeth Higgins
Birth of son:
Robert Currie
Gender:   Male
Birth Date:   4 Jun 1858
Birth Place:   Bridgeton,Glasgow,Lanark,Scotland
Father:    John Currie
Mother:    Elizabeth Higgins
Birth of younger daughter
Agnes Ross Currie ****
Gender:   Female
Birth Date:   24 Nov 1860
Birth Place:   Bridgeton,Glasgow,Lanark,Scotland
Father:    John Currie
Mother:    Elizabeth Higgins
1861:
23 Green Street, Bridgeton
John Currie   27 b Eaglesham
Elizabeth Currie   25
Mary Mckinnie Currie   4
Robert Currie   2
Agnes Ross Currie   
1881:
44 Dalmarnock Road
Same address on 1881 marrige of daughter Mary
John Currie   48 b Eaglesham
Elizabeth Currie   46
Mary Currie   24 **
Robert Currie   22
Peter Currie   17
Elizabeth Currie   11
John Currie   8
William Currie   5
Donald Currie   2
(John Currie died 30 sep 1893 at above address)