Detailed report from Charles Lutwidge, revenue official at Whitehaven, responding to an order from the Atholl Papers archive (dated 18 May 1764) to assess smuggling between Isle of Man and Great Britain. Provides comprehensive account of foreign goods imported to the Island, duties payable to the Duke of Atholl, estimated annual revenue (£7,500), and analysis of smuggling routes, methods, and estimated losses to the Crown (£200,000 annually). Documents the Island's four principal ports and supplies key evidence for understanding the economic incentives behind the 1765 Revestment.