On 17 September 1952, H. Marshall Chadwell, Assistant Director of OSI, prepares a memorandum for
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(Commonly referred to as “the Flatwoods Incident” or “the Flatwoods Monster”).
This incident is Case 38 in Isaac Koi's "Top 100" article, since it was referred to in 61 of the books covered by that article.
This was Project Blue Book Case Number 2078.
This incident featured in a list of cases produced by Greg Bishop for the Fortean Times in 2007 as part of a survey of various researchers of the ten cases from 1947 onwards that interested them the most.
Various sightings occurred during Operation Mainbrace, mainly between 19th and 21st September
These incidents comprise Case 90 in Isaac Koi's "Top 100" article, since they were referred to in 31 of the books covered by that article.
These incidents also featured in a list of cases produced jointly by British ufologists Dave Clarke and Andy Roberts for the Fortean Times in 2007 as part of a survey of various researchers of the ten cases from 1947 onwards that interested them the most.

