conventionDeclaration detailLevel http://ica-atom.org/doc/RS-2#5.4 *Oxford Dictionary of National Biography* person Adair, Sir Robert (1763–1855), politician and diplomatist conventionDeclaration 24 May 1763 – 3 October 1855 Portrait print of Sir Robert Adair Letter from Sir Robert Adair to Jean Sylvain Van de Weyer