He was the leading member of the syndicate which purchased and partly resold the famous Orleans Collection of old master paintings in 1798 (including Diana and Actaeon and Diana and Callisto), and most of his purchases are still held by the Egerton family.
Most of Sutherland's wealth is in the form of the art collection put together by the first Duke's uncle, Francis Egerton, 3rd Duke of Bridgewater, which had been inherited by the Ellesmere line of the family.
In 1798 he was one of the syndicate who bought the Orleans Collection of paintings, many of which remain in Castle Howard.
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From the sale in London of the French Orleans Collection he bought The Raising of Lazarus by Sebastiano del Piombo and other works.