P. C. Post was planing lumber south of Hallsville as early as 1897, according to Harrison County records. That year and in 1898, mortgages reveal that the mill was located in a brick warehouse in the rear of the J. B. Mundy saloon. Post had received the mill from a Trustee sale, Trustee being R. B. Levy. Equipment included a 12-inch by 20-inch steam engine, a 44-inch by 14-foot boiler, a three-saw gang edger, a cut-off saw, shafts and pulleys, six head of livestock, and a Bender log wagon.
The mill was listed in the Reference Book of the Lumbermen's Credit Association, January 1905.
The Cheney and Post at Beckville, in Panola County, may have had a connection with P. C. Post's planing mill south of Hallsville, in Harrison County.
Post earlier had a mill about ten miles southwest of Marshall.