The Oxford English Dictionary

Believe it or not, the Oxford English Dictionary was not completed until five years after Roscoe Bartlett was born. The first volume, starting with A, was published in 1888, and by the time they got to the last volume in 1928, they decided the language had changed so much that they needed to issue a supplement. It wasn't until 1933 that the entire dictionary was published as 13 volumes, counting the supplement. Today, the Oxford English Dictionary consists of 20 volumes, including 291,500 entries on 21,730 pages.