#OTD in 1852.

Roget's Thesaurus, created by retired British physician Peter Mark Roget, is first published as Thesaurus of English Words and Phrases Classified and Arranged so as to Facilitate the Expression of Ideas and Assist in Literary Composition in London.

Roget's Thesaurus at PG:
https://www.gutenberg.org/ebooks/10681

#books #dictionary