Cathcart Scotland -Sanders

Hi.I am desperately trying to find information on a Cathcart family in Scotland.My gg-grandmother, Emma (?) Sanders from England, worked as a domestic servant for the family in the 1870s.They apparently owned a brewery or a distillery, or something of that nature.There may have been an Alexander Cathcart in the family.
If anyone has ANY info. at all, I would really appreciate it.Also if anyone has access to census records (1871), a look-up would be wonderful.Any ideas on how to locate this family would be appreciated greatly as well.