In the summer of 1958, the whole McLuhan family drove to Fort Worth to see Corinne’s family, then went on to the University of California, Santa Barbara. The trip seems to have taken 3 months, with 2 months spent at the summer session of UCSB. The UCSB newsletter, El Gauchito, for June 21, 1958, included the following information:

Four of our distinguished visiting professors will give public lectures during July on Tuesday afternoons at 3 p.m. for both the campus community and campus visitors. The series will be given in the lecture hall of the New Classroom Bldg.
The summer lectures will open July 1 with the distinguished Canadian critic and author, Marshall McLuhan, professor of English Literature, University of Toronto, speaking on “The Electronic Revolution and the Undeveloped Countries of the Mind.” A brilliant wit as well as an intellectual leader, Prof. McLuhan is the founder of the Canadian journal, “Exploration”, and is interested in the problems of communication in this century.

The announcement was repeated later in the newsletter:

Important Coming Events, on campus:
July 1 ALL-COLLEGE LECTURE by Marshall McLuhan, Professor of English Literature, University of Toronto, on “The Electronic Revolution and the Undeveloped Countries of the Mind,” at 3 p.m., New Classroom Building Lecture Hall. No admission charge.  

Earlier that year, on March 31, McLuhan had lectured at the University of Wisconsin, Milwaukee campus, on “TV and the Undeveloped Countries of  the Mind”.