CARNOCK, ARTHUR NICOLSON, IST BARON (1849 1928), British diplomatist, was born in London on Sept. 19, 1849, the son of Admiral Sir Frederick W. E. H. Nicolson, loth Bart. . He was educated at Rugby and Brasenose College, Oxford, and in 1870 entered the Foreign Office as assistant pri vate secretary to Lord Granville. In 1874 he was attached to the British Embassy in Berlin, and after occupying a succession of minor diplomatic posts, became in 1885 chargé d'affaires at Teh ran. From 1888 to 1904 he held posts in Constantinople, Bul garia, and Morocco, where he was minister. In 1899 he succeeded his father as II th baronet. In 1906 Sir Arthur Nicolson went as ambassador to Russia, returning in 1910 to the Foreign Office as Under-secretary for Foreign Affairs. He retired in 1916, when he received a peerage. He published in 1873 a History of the German Constitution. He died on Nov. 5, 1928.