1881 - 77, Cross Street, St Quivox, Ayr, Ayrshire
Robert Anderson Head Married 76 1805 Weaver St Quivox, Ayrshire, Scotland
Martha Anderson Wife - 65 1816 - Newton, Ayrshire, Scotland
Hugh Anderson Son - 20 1861 Slater St Quivox, Ayrshire, Scotland
So either Martha is mistranscribed or Robert Remarried.
Colin