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About This Site

Mark Twain Project Online applies innovative technology to more than four decades' worth of archival research by expert editors at the Mark Twain Project. It offers unfettered, intuitive access to reliable texts, accurate and exhaustive notes, and the most recently discovered letters and documents.

Its ultimate purpose is to produce a digital critical edition, fully annotated, of everything Mark Twain wrote. MTPO is produced by the Mark Twain Papers and Project of The Bancroft Library in collaboration with the University of California Press; the site is hosted by UC Berkeley's Library Systems Office. During 2005–8 the California Digital Library collaborated in MTPO's creation and initial development.

In April 2009, the MLA Committee on Scholarly Editions designated MTPO an "Approved Edition," and in 2015, MTP was honored as part of NEH@50.

The Mark Twain Project receives a generous grant from the NEH's Scholarly Editions and Scholarly Translations program.

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User Guide

Mark Twain Project Online's customizable interface provides a powerful research and reading experience.

Learn more about searching, browsing, and viewing options, as well as how to gather and store digital citations.

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“Damnation, (if you will allow the expression,) get up & take a turn around the block & let the sentiment blow off you…” From SLC to William Bowen, 31 Aug 1876

More than 31,000 catalog records, and more than 3,200 edited letters written 1853–1882.

Recently added:

2024-02-06: Added 69 newly edited Clemens letters from January through March 1884.

2023-10-23: Added 37 newly edited Clemens letters from October through December 1883.

2023-06-21: Added 44 newly edited Clemens letters from July through September 1883.

2023-04-20: Added 50 newly edited Clemens letters from April through June 1883.

2023-03-28: Added 62 newly edited Clemens letters from January through March 1883.


“You don't know about me, without you have read a book by the name of ‘The Adventures of Tom Sawyer,’ but that ain't no matter. That book was made by Mr. Mark Twain, and he told the truth, mainly.” From Adventures of Huckleberry Finn

Full texts and scholarly apparatuses of sixteen volumes in the Mark Twain Project edition published between 1967 and 2015.

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