In 2014 Maryland-based costume collector Sara Rivers-Cofield discovered an encrypted note in an antique silk dress. This cryptogram is unsolved to date. Click here for the complete top 50 list “A curator at work, a collector at home.” This is how Sara Rivers-Cofield describes her interest in antique costumes. In addition, she writes a blog … Continue reading The Top 50 unsolved encrypted messages: 32. The silk dress cryptogram