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°*FD-36 tev. 12-13-56) - _ : : . ; ad FBI Date: 8-19-64 Transmit the following in / (Type in plain text or code) Via ___ AIRTEL AIRMAIL a (Priority or Method of Mailing) TO: DIRECTOR, FBI ATTENTION: FBI LABORATORY FROM: SAX DENVER (9-new) | (P) ee Voknown Sudject : : _JINSUB; THE BEATLES - oe fe os EXTORTION iu6933 D6;, DENVER Office of Crigin . Se: / OY | on 616-6; CI cc's occice, PIE Denver, Colorado, Police Department, advised that on this date _ whe had received a threatening letter in the mail from the office o£ Mr. VERN BYERS, May D&F Company, Denver, Colorado, who is promoting the appearance of the BEATLES at the Red Rocks ae: Jefferson County, Colorado, 8-26-64. 4 stated this letter enclosed another letter, which was . addressed to the BEATLES, Denver, a.m., and marked urgent and ce : important. The envelope was postmarked 8-17-64, Greeley, 4 Colorado, a.m., and the letter was comprised of cut out letters — from a magazine pasted on plain white paper, which reads as N ‘follows: e SAHA D MEL Bt ae Oy —_ FOR LAB ACTION 4% REMRT "If you know what's good for you cancel Denver engagement. I'll be in the audience and I'm going to throw a hand grenade instead/of jelly babies. Sake oe _ “Beatie Hater" 3-Bureau (Encls. 2) (AM) as] 1 toute 2-Denver * Mc “15 \g/| asd wa BBE Bly \ fone - ae ra Sent eWal Agent in Charge