John Benjamin Graham

At his employer's urging and with £250 of his money to invest as well as £40 of his own,[1] he emigrated to South Australia aboard Recovery, arriving in September 1839.

[3] Directors (all major shareholders) were Charles Beck, James Bunce, John Benjamin Graham, John Bentham Neales, William Paxton, William Peacock, Charles Septimus Penny, Emanuel Solomon, and Samuel Stocks, jun., with (later Sir) Henry Ayers as secretary.

He erected a 3-metre-high stone fence, and engaged architect Thomas Price to build for him an opulent mansion of 30 rooms, dwarfing every other pile in the city, including Government House.

The building, which dwarfed every other mansion in the colony, including Government House, loudly proclaimed its owner's wealth, though not necessarily exemplifying good taste.

[4] Around 1847 he brought his mother and stepfather, John Adams, out to South Australia, and had them living with him at Prospect House,[8] presumably as caretakers against the event of Graham's return to Adelaide; this notion is supported by an entry in his diary.

[9] In January 1848 he left Adelaide aboard Gellert for Calcutta, and toured the East and Europe before settling in England.

[16] A similar occasion the following year was marred by a self-selected elite who blocked the Sunday School teachers from the dining room until all the drinks and party food was gone.

By the 20th century suburbia had encroached and the "Castle" was just an unmarketable curiosity off Braund Road, Prospect, and in the way of progress, and was demolished in September 2001.