Phallic Objects: Now Available!
This work is a bit more like "Archaic Rock Inscriptions" than it is the progenitor work "Phallism" albeit it is from the same series. Like other works within the phallism series (again, as always, possibly but not definitively a work by Jennings Hargrave) it relies predominantly on secondary sources, in this case mostly archaeological.
It's a good work; mostly it covers the prevalence of towers, altars, and pillars of similar apparent composition and form across most of Europe (especially Ireland) and India. It may be seen as a somewhat shorter supplement to "Phallism" at large.