Decoding Dickens' secret code

NY Times had a feature on cracking Dickens' secret code:

Shane Baggs, a computer technical support specialist from San Jose, Calif., had never read a Dickens novel before. He transcribed more symbols than any other of the 1,000 people who entered — helping to crack a 163-year-old mystery about one of the world’s most celebrated authors.

It appears, that r/codes subreddit was involved.