<div dir="ltr">Fascinating story about physical security of communication in the pre-industrial world.<div><br></div><div><a href="https://www.atlasobscura.com/articles/what-did-people-do-before-envelopes-letterlocking?utm_source=Atlas+Obscura+Daily+Newsletter&utm_campaign=7f707c590c-EMAIL_CAMPAIGN_2019_07_18_Not_NYC&utm_medium=email&utm_term=0_f36db9c480-7f707c590c-63217145&ct=t(EMAIL_CAMPAIGN_07_18_2019_Not_NYC)&mc_cid=7f707c590c&mc_eid=8437a3c9e4">https://www.atlasobscura.com/articles/what-did-people-do-before-envelopes-letterlocking?utm_source=Atlas+Obscura+Daily+Newsletter&utm_campaign=7f707c590c-EMAIL_CAMPAIGN_2019_07_18_Not_NYC&utm_medium=email&utm_term=0_f36db9c480-7f707c590c-63217145&ct=t(EMAIL_CAMPAIGN_07_18_2019_Not_NYC)&mc_cid=7f707c590c&mc_eid=8437a3c9e4</a><br clear="all"><div><br></div>-- <br><div dir="ltr" class="gmail_signature" data-smartmail="gmail_signature">Jim Windle   <br>(646) 470-9657    <br>Oh, and be sure to state your name so my cyborg can tell me who is calling!<br></div></div></div>