The Skyscrapers Cipher is the most frightening cipher that I have ever cracked.
Here, I’m spotlighting how just to decrypt the 4 columns. Start at the top of the 4th column. Read sequentially, up or down, each of the other 3 columns.
Now, think about what the Daily Express, ‘Heatwave to trigger floods’, probably already knew but couldn’t yet publish. Later that same day, 22 July 2013, it was announced that the heir to the British throne had been born.