I believe I first heard Harlan Ellison make the point that we know of dozens upon dozens of early pulp writers only as names: They conducted their careers entirely by mail—in a field and during an era when pen-names were the rule rather than the exception. Among the “Remmington C. Scotts” and the “Frank P. Joneses” who litter the contents pages of the early pulps, we simply have no way of knowing if one, three, or seven or them—or even many more—were not blacks, Hispanics, women, native Americans, Asians, or whatever. Writing is like that.
— From “Racism and Science Fiction” by Samuel R. Delany