and Lake Lee exists today and Island 84 is now known as Bell Island
You can see the area of interest at:
http://terraserver-usa.com/image.aspx?T=2&S=15&Z=15&X=105&Y=574&W=1&qs=%7cGreenville%7cMississippi
An 1863 map of the area is at http://memory.loc.gov/ammem/collections/civil_war_maps/subject.html, search on Mississippi and several period maps of the river are available. This area is south of Greenvile and north of the LA and AR line (Well south of Helena Arkansas)
John R.