How close is this old road to the Champion House? On the Union maps showing the troop deployments, the Jackson Road appears to run west past the direct route to Champion Hill, and then turns south and reconnects to the farm road on which the Champion House was situated, forming a diamond. Does the Midway Station Road connect to that portion of the Jackson Road?
Have you pinpointed the location of the Champion farm pond that shows up on the Union maps? If so, do you have a good feel for where the slave quarters would have been?