I'm getting some bandwidth to put more work into my book about Boleslaw Gladych and his connections to the gravity (and antigravity) research communities that included characters like Agnew Hunter Bahnson Jr. during the 1950s. I found an article [pdf], (pamphlet? it's 42 pages), that sheds more light on the woork DeWitt did with superconductors and gravitomagnetic fields in the '60s. Take a look at page 34 where DeWitt comments on his work to try to verify Bahnson's fringe pet project: Thomas Townsend Brown's gravitators. There you'll find a reference to DeWitt looking into superconductor theory . I also found a nice little JSTOR blog post on the whole Babson and Bahnson Gravity Days era. I haven't seen anything new in it yet, but I aslo haven't taken the time to focus on it. Speaking of DeWitt, this history of the UNC Field Institute is interesting in that it mentions DeWitt's work related to 'large spaceships'. One final note, Wolfgan...