Groff Conklin was a prolific anthologist from the mid-1940s through the 1960s -- a sort of predecessor to Martin H. Greenberg. He began with four big anthologies (which we'll call "tomes") beginning with Best of Science Fiction in 1946, almost simultaneously with the rather more famous Adventures in Time and Space, edited by Raymond J. Healy & J. Francis McComas. But unlike those editors, Conklin went on to produce three more big anthologies, and a couple dozen of what we'd call "theme" anthologies, over the next couple decades. Which will be compiled here eventually.