On 8 November 1948, a letter from Colonel McCoy to General Cabell in response to further questions raised by General Cabell in the light of the memo from Colonel Brooke Allen dated 1948.1011. (Commonly referred to as “the McCoy Memo”, this is a further document that is occasionally referred to as “the Ghost of the Estimate” (although this term is more often used in relation to a document dated 1948.1210 entitled “Analysis of Flying Object Incidents in the United States”)).