Transmittal And Receipt Slip Fm Mary J Vesper R/D-03 To William F Friedman Envelop No. 11, Yardley's Black Chamber

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, 
BEl~ (unclassi~!ftti~!JI!'i68 7 4 0 
' C'-~StiFIED/HON·ClASSIFIED TRANSMITTAL anci ii!Ci!iiif 
TO 
Mr • William F • Friedman 
310 Second St. S.E. 
Washington 3, D.c. NATIONAL SECURITY AGENCY 
Washington 25, D.C. 
SERIAL OR CONTROL NUMBER 
R/D-03-0l-59 
DATE 
4 May 1959 
t. IT IS REQUESTED THAT RECEIPT FOR THIS MATERIAL BE ACKNOWLEDGED BY EXECUTING AND RETURNING THE 
BELOW RECEIPT. 
2. THIS LETTER MAY BE DOWNGRADED TO UNCLASSIFIED WHEN ENCLOSURES ARE REMOVED. 
INCLOSURESI" 
Envelope No. ll containing Yardley's Black Chamber 
Declassified and approved for release by NSA on 06-11-2014 pursuant to E .0. 1352a 
Mary J.