Library of Congress
Loc: Today in History: September 5: Jesse James & the First Labor Day
Library of Congress site discusses the life of Jesse James and the development of the first labor day in the United States. With links to related, in-depth information.
Legends of America
Legends of America: William Quantrill Renegade Leader of the Civil War
A comprehensive look at the bloodthirsty Confederate raider, William Quantrill, and his raiders as they terrorized the trans-Mississippi West in the name of the Confederacy.
Other
Potter Flats: The True Face of Sue Mundy
A well-documented tale involving the James/Younger gang, and a secret Rebel mission; this page includes a link to a map of the area. Not a spectacular design, but very readable.
Other
Shadows of the Past: Chronology of Jesse James
A synopsis of the life of Jesse James in timeline form. Has links to his family tree, members of the James Gang, and photos.