The ‘Upper Mississippi’ is defined in Wikipedia as the portion north of Cairo, IL, where the Ohio meets the Mississippi, but for this steamboat captain, the southern-most port on the Upper Mississippi seems to have been St. Louis. The northern port was in the vicinity of St. Paul; 800 miles by river. There are a number of photos of steamships, and of some of the locations featured in the text. In the appendix is a list of all the steamboats that traveled the Upper Mississippi from 1823-1863.