This information is courtesy of William Eugene Griffin, of Palm Springs, CA.
One of the earliest post offices in what is now Richland Parish was established by Peter Oliver at Deerfield (now Delhi) in the 1840’s:
Oliver, Peter – “Roads had begun to improve, and freight wagons were in vogue during dry weather. Overland mail routes were being established for the same reason. A mail route was established through this territory by the 1850’s which ran as follows: Deerfield (Delhi) to Floyd, 22 miles; postmaster, Peter Oliver, April 5, 1847. Floyd to Vista Ridge, 8 miles, postmaster, S. C. Floyd, December 11, 1851. Vista Ridge to Caldonia, 15 miles, postmaster, Amos Swator, October 19, 1854. In Oak Grove, John M. Stewart was postmaster in 1857.”
Between the Rivers” Florence McKoin. This was coped from a “Early Settlers of Carroll Parish” blog. Peter G. was my GGG Grandfather who migrated from Kentucky.