Herbertson Memorial Lectures

The Herbertson Memorial lectures were given in memory of A J Herbertson and started in 1918, and were given approximately every three years after that. Here are the titles of those up to the mid 1950s. I wonder what titles would replace these today...

Source
“[OFFICERS OF THE GEOGRAPHICAL ASSOCIATION].” Geography, vol. 38, no. 4, 1953, pp. 265–266. JSTOR, www.jstor.org/stable/40564703.