The Oxford English Dictionary, the first comprehensive catalog of the English language, took seventy years to compile. Volunteers aided the project, and one of the biggest contributors happened to be a murderer who lived in an insane asylum:
Through the years, the OED’s editor had enlisted hundreds of volunteers around the English-speaking world, and probably took for granted that a mysterious stranger was happy to cite word usage for him all day, because he was editing the most ambitious lexicographical project in the English language to date.