This is an extract from the 1881 Census Returns for Northumberland which includes Ford.
Living at Ford Castle is L A Waterford. Lady Waterford, aged 62 years, was the head of the household, widowed and employed 13 servants. Her occupation was that of a Marchioness / Land Owner and she was born at the British Embassy in Paris, France.
Census Returns are an excellent source when doing family history. The Northumberland Record Office holds microfilm and microfiche copies of the Northumberland Census Returns from 1841 to 1901.