British Opioid Colloquium [B.O.C.] Correspondence file with the British Opioid Colloquium, principally containing personal correspondence and circular communications regarding meetings of the Colloquium. Includes correspondence regarding formation of the Colloquium, 1985 - 1986 and programmes for meetings held at the University of Cambridge, 22 - 23 March 1990 and 8 - 9 April 1991. 1985 - 1991