<div dir="ltr"><div dir="ltr"><div class="gmail_default" style="font-size:small"><br></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Tue, Feb 11, 2020 at 2:16 PM Jerry Leichter <<a href="mailto:leichter@lrw.com" target="_blank">leichter@lrw.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><br>
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No kidding!  How long has this been widely known?  Apparently not very long, to WaPo.<br>
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                                                        -- Jerry<br></blockquote><div><div style="font-size:small" class="gmail_default">Here's a 2015 BBC piece.  <a href="https://www.bbc.com/news/uk-33676028">https://www.bbc.com/news/uk-33676028</a></div><div style="font-size:small" class="gmail_default"><br></div><div style="font-size:small" class="gmail_default">But ISTR that there were hints of this in Kahn's 1968 book---<i>Codebreakers</i>.   My copy is 30 miles away--so I cannot check it.  <br></div><div style="font-size:small" class="gmail_default"><br></div><div style="font-size:small" class="gmail_default">Chuck<br></div><br></div><div><br></div><div><br></div><div><br></div><div> </div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
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</blockquote></div><br clear="all"><br>-- <br><div dir="ltr"><div dir="ltr"><div><div dir="ltr"><div>Chuck <br><br>======================<br>Charles L. Jackson<br><br>301 656 8716    desk phone<br>301 775 1023    mobile <br><br>PO Box 221<br>Port Tobacco, MD 20677</div></div></div></div></div></div>