This mansion has a strong Gothic influence with its pointed windows edged with pillars and its castellated chimneys. Originally named Eotherm, it was built in 1891 for Charles Hornabrook who made his fortune as the licensee of the York Hotel in Rundle Street and by some shrewd purchases of real estate. The house was designed by Hornabrook’s brother-in-law, George Soward, of the successful architecture firm English and Soward.
Prominent residents included Malcolm Reid, and Sir John Bonython.
In 1928 Sir John Lavington Bonython and his family moved into the house which he renamed St Corantyn. He took over the proprietorship of The Advertiser newspaper from his father. In 1910 he became the youngest Mayor of Adelaide and held the office on five occasions. He was a foundation member of the board of the South Australian Housing Trust.
http://www.cityofadelaide.com.au/adccbrandwr/_assets/main/lib60091/walktrailhistorical.pdf