From “Assignment Oswald” by James Hosty, page 106:
Suddenly, DeBrueys exclaimed, “Thank God!” I walked over to his side of the desk and looked over his shoulder at the document he was reading. It was a letter that Lee Oswald had written to the national office for the Fair Play for Cuba Committee in New York City. In the letter, Oswald acknowledged that he was the only member of the New Orleans branch of this committee, and that he used A. J. Hidell as one of his aliases. DeBrueys said that he had only deduced, not definitively concluded, that Oswald was the only member of the committee in New Orleans and used Hidell as an alias. This letter, in Oswald’s own handwriting, completely validated DeBrueys’s deductions. He was visibly relieved, because he knew that the rifle trace had largely depended on his deductions.
Is this letter from LHO to the FPCC in the record for us to see?