Cathays Lord Windsor) on 12 November 1766, he inherited great further lands including in Cathays to the north of his existing estate which he had partially had developed. He then bought other properties and farms, to the north and east, including what became Cathays Park. There he built Cathays House at a cost of £40,000 and at further cost landscaped Cathays Park. After his son took over the title he preferred to live in Cardiff Castle so demolished the house in 1815, and turned Cathays Park into purely enclosed parkland used for grazing. Following the 2nd Marquis' development of Cardiff Docks,
Fairwater, Double Bay company, only for it to collapse (in a major stockmarket downturn) three years later. Lady Mary Fairfax (née Marie Wein, 1922-2017) established the Australian Opera Auditions in 1964, in cooperation with the Metropolitan Opera in New York. This was the first of a string of charitable organisations connected with the arts which she joined or initiated. She had lived at Fairwater since 1968, where she conducted a never-ending salon where guests were able to admire the art works of Rodin, Epstein, Dobell and Degas. Among those she entertained were actor Rudolf Nureyev, politician Pierre Trudeau, actor Phyllis Diller, entertainer Liberace,