sentences:  From November 1911 to 1916 he served as Envoy Extraordinary and Minister Plenipotentiary to the King of Montenegro at Cettinjé, and was Envoy Extraordinary and Minister Plenipotentiary on a special mission to the Holy See in 1916–1923, (Pope Benedict XV 1916-1922, and same to Pope Pius XI 1922-1923).He was a member of the 1931 Malta Royal Commission (report issued in a blue book, 11 February 1932).In 1919 the British Government sent de Salis to investigate the Serbian occupation of Montenegro, but his resulting report was suppressed.