Margaret Roy???

[allanroy]

 I found the following family in the 1881 census, I need to find out who her
 husband was, and idea's or help?

 Margaret  was born about 1850 in Androssan, Ayr, Scotland.
  Living in Nineyard Street Saltcoats widowed and with her children in the
 1881 census.
               Margaret had the following children:
                James ROY  was born about 1873 in Saltcoats, Ayr, Scotland.
                John ROY  was born about 1876 in Saltcoats, Ayr, Scotland.
                Mary ROY  was born about 1877 in Saltcoats, Ayr, Scotland.
                Joseph ROY  was born about 1878 in Saltcoats, Ayr, Scotland.

 Thanks
 Allan Roy