Came across this, and thought you might find it interesting.
Encrypted messages exchanged in Detective Story Magazine, solution was found and is in the comments on the blog.
Around 1920, a US pulp magazine published an encrypted message exchange in its “missed persons” column. The cleartexts might refer to a familiy drama. Even two of the world’s greatest codebreakers apparently could not make sense of these cryptograms.
Another encrypted message here, this time in Adventure, July 1934
|Encoded message in Adventure, July 1934, Ask Adventure column|
In 1934, a US magazine published an encrypted message a reader had found in an old document. The solution is not known to me.