I knew this would happen.
Much of what Keel claimed in things like Mothman relies solely on his own statements. That's true of his earlier book, don't recall the title and I'm not going to look.
Jadoo or something, I think. A lot of it sounds like tall tales and as I recall it was considered to be just that. Loren Coleman said in a Paracast interview that the original reports from Point Pleasant involved what sounded like a very large owl. It's not hard to imagine something like that getting out of hand quickly. I've always thought Keel's Mothman chronicle was a lot like Whitley Strieber's work. Probably based on something real, but
come on. As much fun as the creepy Indrid Cold character is, I have a hard time buying all of the things he supposedly did. That's not to say I don't enjoy a lot of Keel's work. I just don't see him as the visionary genius he is often said to have been.
If you can find a copy of the first edition of Vallee's
Forbidden Science, it is well worth reading. The second edition is, too, but it's really and abridged edition with some new stuff included. In there you can see the development of Vallee's and Hynek's ideas in terms of interdimensional travel. It's obvious that both men later approached most of the UFO business from that perspective. They were both hard core scientists, and needed a rational framework to work within. I'm not current on Vallee's work. I should change that. I don't see much difference between the label Consciousness and Interdimensional, but that's getting pretty close to my personal philosophy which I do not discuss at places like this, for very good reasons of my own.
I hope that answers your questions, because I have no interest in arguing about Keel or Vallee.