I wonder if Heinlein knew about these when he used Shasta as the home of the good psychic adepts in Lost Legacy - https://en.wikipedia.org/wiki/Lost_Legacy http

I wonder if Heinlein knew about these when he used Shasta as the home of the good psychic adepts in Lost Legacy - https://en.wikipedia.org/wiki/Lost_Legacy https://en.wikipedia.org/wiki/Lost_Legacy . Looking into it now ... almost certainly yes! "War over Lemuria: Richard Shaver, Ray Palmer and the Strangest Chapter of 1940s Science Fiction" - https://www.goodreads.com/book/show/17120233-war-over-lemuria https://www.goodreads.com/book/show/17120233-war-over-lemuri... : > Whatever else the Shaver Mystery was, it became a worldwide sensation between 1945 and 1948, one of the greatest controversies to hit the science fiction genre. Today these stories of the remnants of a sinister ancient civilization living in caverns under the Earth are an all but forgotten sidebar to the historical record.