I had a look at the 1881 census disk but have no real hot numbers. Below a few for consideration, Do you know where they were born? Ann age 36 born Kinlochluiachart, wife of Duncan Mackenzie with son William age 9 mo, living at Strathbran, Contin Ann Mackenzie age 40, born Applecross Domestic servant, not married, at Kerkan, Contin Janet age 50 born Dingwall, not married, crofter of 6 Ac. at Muir of Highfield, Logie Wester with an idiot brother Donald Janet Mackenzie age 52 born Contin, not married, Housekeeper at Coul House, Contin. Alexander Mackenzie age 58 born Gairloch, married to Isabella age 52 born Contin, at New Buildings Contin, with family Abigail 20, Alex 18, Henry 16, John 14, James 11 all born Contin. Alexander Mackenzie age 54 born Lochbroom, married to Margaret age 44 born Kilmorack with sister Christina age 36 born Lochbroom all at Surfaceman's house, Contin. Some other mentions of surfaceman's house have the word "railway" also. Hope this of some help