In the separate colony of South Australia an independent Cobb & Co Limited took over the South Australian mail and coach business of William Rounsevell in 1866 after several years of ruinous competition. Its ownership was held by four interests of a quarter each. One quarter by Canadians, Peleg Whitford Jackson & Jasper Bingham Meggs; one quarter by Fuller, Hill & Co; one quarter by Joseph Darwent and one quarter by Rounsevell's son Ben Rounsevell. This business was taken over by John Hill & Co and years later was merged into Graves, Hill & Co.