A formal letter from the Treasury to the Duke of Atholl (presumably) dated 25 July 1764, offering to negotiate the purchase of the Isle of Man or the Duke's claimed rights on the island. The letter cites parliamentary powers under the 12th of George I and references illicit trade between the Isle of Man and other British dominions that damages royal revenues. The Treasury requests either a proposal specifying what property and rights the Duke is willing to sell and at what price, or notice of his unwillingness to negotiate.