Evidently called the Twining Letter (written by a Twining) - here's the direct link to read it yourself - Twining Letter (from the nicap files) - yeah, there's a lot of old letters about UFOs but look at what this one doesn't say.... for instance... the lack of ANY crash is specifically mentioned.... was this a disinfo to deny Roswell? or the real truth about the incident.... and the statement that the possibility exists that these objects `are of domestic origin' (earthly I interpreted it) -- indeed, plans to build such craft in 1947 even. Use the above link to look closely at the letter below.
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UFO Disclosure
Ludicrous Foes