Doc 0000151880

25 January 1957 Dr. Harris Isbell# M.D •• Director Addiction Research Center National Institutes of lt!ental Health U.S. Public Health Service Hospital Box 2000 Lexington# Kentucky Dear Dr. Isbell: ..... I have finally been able to get a copy o! a pa.per reporting the first work on the barbiturate inhibitor which I sent you some weeks ago. I hope that this will provide sufficient information so that you can proceed with some experimental work. As I get more information# I will pass it on. The particular compound that you have is the plain 1, 4 e~do;iy-hexahydropilthalmide and is of the same batch that \?1as t:sed in the reported experiments. I hope that I will get a chance to visit you in the near future. Sincerely yours, E:1closure: ' Copy of paper on barbiturate inhibitor DeeTassifieCI t;y -187475- TSS/ Bate -.,..~ -4~FE"""B~1=97=7::---- - I ..... .... -- ... ~ ~ . . .· -~-- This page features a graphic design with text overlays. On the left, a stylized, metallic vault door with intricate locking mechanisms is visible against a dark background with blue accents. White text is centered on the right, detailing that the document originates from "The Black Vault," an online archive of declassified government documents, specifically mentioning the "MKULTRA/Mind Control Collection." Below this, a yellow URL points to "http://mkultra.theblackvault.com." There are no photographs, handwritten annotations, official stamps, forms, diagrams, tables, redactions, or visual evidence of experimental procedures present on this page. The document is a declassified letter dated January 25, 1957. There are handwritten annotations on the page, including a circled number "81" to the right of the addressee's information, and a handwritten note "Thot" at the top right. Additionally, there's a hand-drawn symbol resembling an "81" in a circle at the bottom right, and a handwritten code "A-265" to the right of the main text. Official stamps indicate the document was declassified by "187475" on "4 FEB 1977." There are also sections of obscured content, both as dark redaction marks and some lighter, possibly smudged areas, particularly on the left side near the date "25 Jan 57" and a larger section below this date. No photographs, diagrams, or visual evidence of experimental procedures are present.