This post is a growing list of resources from the period in America between 1776 and 1861.
John Ordway journal, 1804-1806
William Clark diary, August 25, 1808 - September 22, 1808
Diary of an Early American Boy: 1805
Lady Nugent's Journal of Her Residence in Jamaica from 1801 to 1805
Martha Ballard, January 1, 1785 to May 12, 1812 (27 years)
John Collins Warren Papers 1738-1926
December 13, 1803 | Journals of the Lewis and Clark Expedition
Diaries, Memoirs, Letters and Reports
Along The Trails West
First 43 Sessions of Congress, 1789-1875
Lewis & Clark, Journal Excerpts, 1803
Prices and Wages by Decade: 1800-1809