Two Years Before the Mast, and Twenty-four Years After
- The text of the book, including footnotes, available either by chapter or with the entire book as one file.
- http://etext.lib.virginia.edu/toc/modeng/public/DanTwoy.html

Seventy-Six Years After
- As a section in a later edition of "Two Years Before the Mast," the author's son compares the California of his father's time with the California of 1911; provides updated information about the fate of the vessels and people mentioned in the boo
- http://www.winthrop.dk/seventyfive.html

Richard Henry Dana, Jr., 1815-1882
- Biographical essay by Homer Eaton Keyes, B.L., Assistant Professor of Art in Dartmouth College.
- http://www.du.edu/~ttyler/ploughboy/danabiography.htm

Wikipedia: Richard Henry Dana, Jr.
- Includes biographical material and a list of selected works.
- http://en.wikipedia.org/wiki/Richard_Henry_Dana,_Jr.

Richard Henry Dana Brief
- Legal brief, written by Dana in 1868, concerning the plans to try Jefferson Davis for treason.
- http://www.texashistoryhunter.com/rhd.html

Richard Henry Dana
- Chapter 14 of the book "Time of the Bells" by Richard F. Pourade focuses on Dana's experiences in San Diego.
- http://www.sandiegohistory.org/books/pourade/time/timechapter14.htm

Harvard Classics: Two Years Before the Mast and Twenty-four Years After
- Text of the book, with search function.
- http://www.bartleby.com/23/