Address to the Royal Society of Edinburgh, Mar 5 1973, 'The role of the "observer" in quantum physics - an implication for the relation of physics to biology?'. Includes invitation plus related correspondence, 1971-1973.

Lecture at CERN, Mar 28-Apr 4, 1973 'Some old fundamental problems of physics'. Includes invitation and related correspondence, abstracts of lectures (4), travel and accommodation arrangements and programme, 1972-1973.

Centenary Conference, Physical Society, Jersey, Apr 1974: correspondence.

Visit to Laboratòrio de Fisica de Universidade, Coimbra, Portugal, Dec 1973-Jan 1974: correspondence regarding the scheduling of the visit.