Apart from an interlude during 1860 and 1861, when he was obliged to go to Auckland to reinvigorate the firm – now called Brown Campbell and Company – and to install a resident partner, the Campbells lived in various parts of Europe until 1871. On his return early in 1871, Campbell took over full control. Two years later he bought out Brown's partnership share for over £40,000. Becoming a part of the business community again, he became involved with the Bank of New Zealand, the New Zealand Loan and Mercantile Agency Company, the New Zealand Insurance Company, and related companies. He founded Auckland's first school of art in 1878 and supported it for 11 years.