Smaller items of correspondence have been aggregated and arranged in alphabetical order by surname. Where substantial correspondence exists, separate files have been created, as in the case of Dr. Emre Araci, conductor and musicologist; opera singer Ian Caddy; Nobel Laureate and physicist Professor Peter Higgs; Professors Anthony 'Sandy' Robertson and Francesca Bray; theologian and scholar Fr. Brocard Sewell; and author Professor Alexander McCall Smith. All correspondents featured throughout this sub-series were noted in original finding aids prepared by Lucinda Mackay as being 'distinguished individuals'.