Bertha Bauer Lecture, McMaster University, Ontario, Canada, 14 September 1978 Katz gave a lecture titled 'Synaptic transmission — from multicellular to molecular action'. Correspondence re invitation, arrangements, travel, information on people at the University and queries on temperature of Niagara Falls. Also includes a poster advertising the lecture, two black and white photographs of Katz talking to students and handwritten brief lecture notes. Includes correspondence with Jack Diamond 1978