Gilder Lehrman Collection - One of the largest collections of American historical documents in private hands. The collection's holdings are strongest from 1760 through 1876. - http://gilderlehrman.org/
The Emancipation Proclamation - Complete text. - http://www.archives.gov/exhibits/featured_documents/emancipation_proclamation/index.html
Charters of Freedom - Information and images on several important historical American documents including the Declaration of Independence, Constitution, and Bill of Rights. - http://www.archives.gov/national-archives-experience/charters/declaration.html
American Experience - War Letters - Feature about war letters from the American Revolution to Desert Storm. Film description, transcript of letters, timeline, gallery, and teacher's guide. - http://www.pbs.org/wgbh/amex/warletters/
Warletters.com - The Legacy Project - The project's mission is to honor America's veterans and active duty personnel by preserving their wartime letters and other written communications. - http://www.warletters.com/
Historical Text Archive - Documents categorized by the following: Native American, Colonial, Revolutionary, Early Republic, 19th Century and 20th Century. - http://historicaltextarchive.com/sections.php?op=listarticles&secid=17
Slaves and the Courts 1740-1860 - Collection of legal documents, pamphlets, and books concerning slavery, slaves, and abolition. - http://memory.loc.gov/ammem/sthtml/sthome.html
The United States Democratic Review - Political journal archive, published from 1837-1859. Part of the Making of America e-text collection at Cornell University. - http://cdl.library.cornell.edu/moa/browse.journals/usde.html
American Newspaper Repository - A collection of original late nineteenth, and twentieth century newspapers. - http://home.gwi.net/~dnb/newsrep.html
Journey Back In Time - Michael Kocha's collection of thousands of historical newspaper articles, documents, and writings of America's past spanning more than 400 years. Available online by subscription. - http://www.journeybackintime.com
The Bowen Freedom Foundation - Text of numerous documents from the early history of the United States. - http://freebowen.bravepages.com/Bowenfreedomfound.html
Chinese Exclusion Act, 1882 - Text of the Chinese Exclusion Act which barred Chinese laborers from entering the United States and denied them naturalization. - http://www.mtholyoke.edu/acad/intrel/chinex.htm
From Revolution to Reconstruction: Documents - Extensive collection of hypertext transcripts of historical documents, speeches, letters, and other source material pertaining to U.S. history. - http://odur.let.rug.nl/~usa/D/
Constitution of the Confederate States of America - Hypertext from the Revolution to Reconstruction project, University of Groningen. - http://odur.let.rug.nl/~usa/D/1851-1875/constitution/css.htm
Core Documents of U.S. Democracy - Key documents that define the American democracy, divided by governmental branch. - http://www.gpoaccess.gov/coredocs.html
OurDocuments.gov - Milestone documents of American history, presented by the National Archives and Records Administration. - http://www.ourdocuments.gov/
HarpWeek - Sells fully indexed, digitized version of Harper's Weekly, the preeminent news and literary journal of the last half of the 19th century. - http://www.harpweek.com/
Bartleby.com: American Historical Documents - Text of 47 treaties, speeches, historical accounts, and governmental documents from Eric the Red's c. 1000 description of Vinland to the Panama Convention of 1904. - http://www.bartleby.com/43/
The Avalon Project - Major documents collections from pre-18th century to present day. Includes Mexican-American diplomacy and US statutes concerning Native Americans and slavery. - http://www.yale.edu/lawweb/avalon/major.htm
Interpreting the Declaration of Independence by Translation - The Declaration of Independence, as it has been translated into different languages, and at different times. Compliments March 1999 Journal of American History roundtable discussion of the same title. - http://chnm.gmu.edu/declaration/
US Historical Documents - A Chronology of US Historical Documents from pre-Colonial to present day. - http://www.law.ou.edu/hist/
Words and Deeds in American History - Library of Congress- "Representative documents spanning from the fifteenth century to the mid-twentieth century." - http://lcweb2.loc.gov/ammem/mcchtml/corhome.html