After his sawmilling experience at Sunset (Olive), Robert W. Snelling was appointed as postmaster of Seneca, just outside of Woodville. Because postmasterships often went to the leading sawmiller in an East Texas town, it is quite possible that Snelling owned a sawmill at Seneca before moving on to Midline Switch in the 1890s. W. T. Block believes that this sawmill was one belonging to Robert P. Snelling & Co., which built at Seneca in 1887 after the hurricane that totally destroyed the R. P. Snelling mill the previous October at Kountze.
Walter Webb noted in his Handbook of Texas that Milton, Texas, in Tyler County had earlier been called Seneca. He reported that a sawmill had operated for several years at Seneca after 1884.