Mark Twain Project Online

The previous version of marktwainproject.org may be viewed at legacy.mtpo2.org/

The Letters of Mark Twain is the Mark Twain Project's comprehensive collection of Samuel Clemens' correspondence. The Catalog contains records documenting all 11,000+ known letters by Clemens. The site also provides authoritative, critically edited and annotated texts for the majority of letters through 1884. Use the search tool below to find letters by keywords, date, addressee, or location.

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Search: Enter terms (e.g., civil war) to find matches in text, titles, or metadata. Words are searched separately; use 3+ letters for partial matches (e.g., mic finds microscope).

Filters: Refine by year range (e.g., 1860–1865), addressee, repo code, or place. Sort by relevance, date, repo, or location.