The running key challenge I posted the other day has already been solved by Matthew Brown. He reavealed a lot more than 20 consecutive words I required. He is confident that he could eventually retrieve the entire message, though it would be quite time consuming.
His solution by a dictionary attack (importantly, using only long words) to find candidates followed by manually extending the fragments obtained would be the best practical approach for the time. Congratulations!
For more details, see the updated article, "Solving Running Key Ciphers (Manually/Digitally)".
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