I found the summary useful. I read the whole Guardian article and Bruce highlighted the really interesting part. The only other question was: what's in the lett

I found the summary useful. I read the whole Guardian article and Bruce highlighted the really interesting part. The only other question was: what's in the letter? The answer is pretty boring, just a standard communique between two leaders during a conflict and talk about a previously unknown murder plot (which was just a rumour). The meat is the cipher.