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en ONAT, ONF UNITED STATES HEP vn loag si ; O NUMBER SAC FEDERAL LV KLAU DF INVESTIGATION Senies 1952 “March 4, 1952 “we toe - Bm ot a . - BEVO FOR MR. HCOVER BRANIGAN an FONTZ_ — cow POLSON. = BROWN, B.C. 0 JONES, Me AL ee EAD | CALLAHAN _KEAY «ws ”~SC”s«#REENNEBERGER +4. NICHOLS | CALLAN - °° LAUGHLIN — ROGERS - Forty BELMONT =. CLEVELAND _— LEONARD - _ SCATTERDAY 08 8 GONNELLEY DeLOACH . MASON, E. D. STANLEY thst gpavin | DOTNING | MeGUIRE STEIN fa ..). °HARBO ®)—sEDWARDS, H. L, © McINTIRE, K. BR. TAMM, Q. Jott 229 ROSEW EGAN |. MORR = ——~<C~*«STROT'T'ER oT eet PRAGY - FEENSY ' NAUGHTEN _ WHERRY . Wiz ur J MBAUMGARDNER ©“ GEARTY, 6. ‘NEASE (8 WECK oe, .. <"L. ) BERRANCER © HENNRICH PARSONS “WENTERROD . Se ee BOWLES HOOD (ee PENNINGTOR = Lo et “bo NE Conf Abra +e Glos helio AG 2 “26-5 = 7 ops, RE TECHNICAL AND MICROPHONE uy Tater VG SURVEILLANCES ee So) Brfective inn ediatel: authoriza tion will not be sranted to jastall any microphone survoillance involving a trespass, and if any such type of ‘tnstallattion is now being ut tilized, ‘L€ should be discontinued at once and the Bureau advised, a In addition, when submit tins a “sumiary report in any type of case which contains internation received from a telephone microphone or other technical surveiilance utilized by the Bureau or any other Federal Agency (when known), it must be accompanied by & cover letter pointing out to the Bureau that such information 15 contained in the. report, , I want it thoroughly understoad_that the handling of these survetllances must be perscnally supervised by you and Bu- reau Pequirements closely followed at all times, — - ‘ ars ne _ . Very truly yours, ao “John Eds ar Hoover _ Director