Hello Jerwood,
On the 1851. census, Tarbolton, Tarbolton Village, we have this family.
Thomson John, Head, age 70 years, M. M. Propritor of Land And Houses, born Tarbolton,
Thomson Janet, Wife, age 66 years, M. F. born Mauchline, Ayr,
Reid Thomas, Grandson, U. M. age 17 years, Student ( Orig Scholar ) born Tarbolton, Ayr.
This is The John Thomson, and his wife Janet Ronald, i was refering to, and Thomas Reid, is the son of Andrew Reid, and Elizabeth Thomson.
There is a death for Elizabeth Thomson Reid, died 1867. age 65 years, Tarbolton, Ayr. i think this is your lady.
Regards,
Jonn.