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
Boundary Treaty of 1881 between Chile and Argentina that older boundary treaties became obsolete and both countries agreed to submit any future disputes to the decision of a friendly third country. The law of the sea at the time of the 1881 treaty was different from the articles of the 1982 Law of the Sea, which meant that Chile and Argentina adhered to the accepted practice of a three nautical mile territorial sea. Therefore, the treaty emphasized the delineation of land boundaries including islands but did not stipulate the offshore limits, which have since been expanded to . According to the Argentine view of the treaty, called the