In the early years of his service, he was posted at
Petrograd,
Washington, D.C.,
Buenos Aires,
Tehran,
Brussels,
Bern,
Stockholm and
Copenhagen. and the following year he became
chargé d'affaires at
Darmstadt (
Hesse) and
Karlsruhe (
Baden). He received official allowances for knowledge of Russian and Persian and spoke five other languages fluently. After the
dissolution of the union between Norway and Sweden in 1905, Herbert was appointed the first British envoy to the newly independent Norway, with the then-customary title of
Envoy Extraordinary and Minister Plenipotentiary. He was the first foreign envoy to arrive in Christiania (now
Oslo) after the recognition of Norway as an independent state by foreign powers. The Villa Frognæs remains the official residence of the British Ambassador, but new offices have been built behind the house, facing , to house the embassy. Herbert was appointed envoy to Mexico in 1911 but did not proceed and instead retired from the diplomatic service. Sir Arthur was Deputy Lieutenant of
Monmouthshire. ==Personal life==