“…I thank Mike Roche (personal communication) for pointing out (his designation) that Harris is an “academic grandson” of Sauer’s, by virtue of the fact that Harris’s doctoral supervisor (Andrew H. Clark) was one of Sauer’s Ph.D students at the University of California in Berkeley. The make-up of the Sauer family tree, a veritable geographical genealogy, is an abiding interest of a great-grandson of Sauer’s, Kent Mathewson et al (2020). I, too, am a great-grandson of the twentieth century’s greatest geographer.…”