The most widely used railroad in antebellum Mississippi connected which two Mississippi cities?

The most widely used railroad in antebellum, in Mississippi State, was The West Felician, whose construction lasted nearly 10 years. In 1842 was completed and since then, it started working. This railroad connected the Mississippi River port of Bayou Sara, Louisiana to Woodville, Mississippi. Its main function was to transport cotton.

Adding to that, the most successful early railroad was from Vicksburg to Jackson (both cities of Mississippi). This was possible because at that time Jackson's economy was based on the cultivation of cottons, which happened to be U. S.'s leading export, and both cities had several transportation routes merging (I. e.: The Natchez Trace which extended from Mississippi to Tennessee).

By the time The Civil War started, Jackson's population had already increased a lot: soldiers came and went through the city and people looking to enhance their economy also decided to give this city a try. All of this increased even more the traffic, activity and use of the merging transportation.