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 stone retaining walls being both part of the earlier build of the house and as an element which set the garden and house within the land allotment. The plantings within a large land holding situated on the foreshore of Port Jackson. The place is important in demonstrating the principal characteristics of a class of cultural or natural places/environments in New South Wales. The association between "Fairwater" and J. W. Manson in view of the house being one of a number of new buildings undertaken by Manson and Pickering in the local area during the period -1912. Fairwater, Double Bay Fairwater