Alan, I’m probably beating this to death, but I dug out my father’s old folio of Miss. county highway maps dated 1950. He ran seismograph crews in the boonies at the time and these showed every road, paved to dirt, and dwellings, which was necessary in his work.
Here is a pic of a portion of Hinds County. The numbered red dots are 1) Edwards, 2) Champion Hill crossroads, 3) Dillon’s Plantation, 4) Auburn cemetery and 5) Raymond. Roads change of course but I see Pemberton’s route (red) to the crossroads and then south to Dillon’s. The green route is the Port Gibson road that Grant took to Dillon’s, then to Raymond. I’ve highlighted Mt. Moriah Rd. as it is named on new topo maps in orange as a direct route between Edwards and Dillon’s. No way to know if it was in existence in 1863, but if so Pemberton was fortunate that the 2 divisions at Auburn didn’t move into his rear as he headed east for Champion Hill.
The tiny black squares are farm unit are labeled farm units-I assume houses.
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