Hi George, nice to hear from you again.
This one has stumpped me as well.
What I have found is Thomas Dickson in the 1891 Census with the following.
Andrew Dickson - son born 1889 Lanark
Elizabeth Dickson - daughter born 1876 Lanark
Helen Dickson - daughter born 1887 Lanark
Jane Dickson - daughter born 1872 Lanark
John Dickson - son born 1881 Lanark
Thomas Dickson - son born 1878 Lanark
William Dickson - son born 1880 Lanark
Thomas Dickson - head born 1851 Lanark - general labourer
Helen Dickson - wife born 1852 Lanark
Address - civil parish Govan, Lanarkshire 38 McLean St.
Also found Thomas and Helen in the 1871 Census
Helen Dickson - visitor born 1851 Glasgow
Thomas Dickson - visitor born 1851 Lamesley, Lanarkshire - Shopman
John McSmith age 21
John McSmith age 6 mons
Mary McSmith age 20
Address - 128 Vermont St., Govan, Lanarkshire - the same address as their marriage.
I'll keep you posted as to what else I can find
Ann