Another popular type of cryptogram puzzle is the number-to-letter cipher, known as a Polybius cipher, because its invention is attributed to the Greek historian Polybius (c. 200-c. 118 BCE). One ...

"Bismark Omit leafage buck bank." That seemingly random string of words appears in something called the Silk Dress cryptogram, 23 handwritten lines on two sheets of crinkled paper that were discovered ...

You're currently following this author! Want to unfollow? Unsubscribe via the link in your email. In late 2013, archeologist Sara Rivers Cofield was at an antique mall in Maine when she bought a ...