Paul Methuen (diplomat) gained valuable diplomatic experience and the esteem of King Pedro. During two absences of his father he became chargé d'affaires, rising to Minister on his father's appointment as Lord Chancellor of Ireland in 1697. He was unable to prevent a Portuguese-French alliance in 1701. When his father returned to Portugal a special envoy in 1702, they were successful in breaking the alliance in 1703. The led to the Methuen commercial treaty between England and Portugal, the basis of Britain's monopoly of Portuguese trade for much of the 18th century. His father remained in Portugal as ambassador. In 1705, Methuen served
Jay Treaty postponed it until the United States was strong enough to handle it. Bradford Perkins argued in 1955 that the treaty was the first to establish a special relationship between Britain and the United States, with a second installment under Lord Salisbury. In his view, the treaty worked for ten years to secure peace between Britain and America: "The decade may be characterized as the period of 'The First Rapprochement.'" As Perkins concludes, For about ten years there was peace on the frontier, joint recognition of the value of commercial intercourse, and even, by comparison with both preceding and succeeding epochs,