[3] In 1869 and 1870, the Louisville and Nashville Railroad (L&NRR) was constructed through the southernmost section of Harrison County, connecting New Orleans, Louisiana, and Mobile, Alabama.

[9] At the time of the Sullivan – Ryan fight, it was described as the largest and oldest hotel on the Mississippi Gulf Coast and catered to planters, steamboat operators, merchants, and gamblers.

[9] In 1877, Jefferson Davis, former president of the Confederate States of America, moved to Beauvoir Plantation in Biloxi and remained there until his death in 1889.

[11] In March 1888, at the courthouse in Mississippi City, Davis gave a speech pleading for unity of all U.S. citizens after the American Civil War.

[12] Before the 20th century, Mississippi City had a colorful history as the site of courtroom gunfights, political debates, saloon brawls, and mule races.

[12] Harry G. Gibson (1870–1898), a native of Indiana, was indicted on January 17, 1898, by a grand jury of the Circuit Court of Harrison County, Mississippi.

[15][16] The last remaining of these buildings had served as a grand jury room and clerks' offices, but it was destroyed in 2005 by Hurricane Katrina.