Kathleen Ludwick had a lucrative 1930, about that we can be reasonably sure.  About anything else—not much.  Although she did leave evidence she appreciated her Fort.

Ludwick had come to the attention of bibliographers before I happened upon her, for her story in Amazing Stories Quarterly “Dr. Immortelle” (1930, of course).  In his great resource Science Fiction: The Gernsback Years, Everett Bleiler supposes that the Kathleen Ludwick listed as writing the article might be the same Kathleen Ludwick who the social security agency listed as dying in 1970.  That Kathleen Ludwick was born in New York in 1892, and passed in Maryland.