Webster’s dictionary took him 26 years to finish. It ended up having 70,000 words. He wrote it all himself, including the etymologies, which required that he learn 28 languages, including Old English, Gothic, German, Greek, Latin, Italian, Spanish, Dutch, Welsh, Russian, Aramaic, Persian, Arabic, and Sanskrit. He was plagued by debt to fund the project; he had to mortgage his home.

James Somers: You’re probably using the wrong dictionary