Upon its publication, in 1904, The Barnum Family, 1517-1904 stated that none of his descendants had yet been found.
Land Records & Land Patents Book #138, Barry Co., MO has the following entry on page 381: Barnum, Pliny, Patent #2959, 3 Jan. 1860. Rachel Barnum & Matthew Flowers. Pliney [sic] Barnum, Pvt. in Capt. Denney’s Co., N.Y. Militia War of 1812. Located: N 1/2 of S 10, T 22, R 27 - 80 Acres.
Pliny and his family traveled to Ohio in 1818, in a two horse wagon, covered with a brown linen top. His cousin, P. T. Barnum, quoted in Danbury, Connecticut: Town History, 1684-1896, says that the family began the trip by driving into the village of Bethel, where all their neighbors and friends met them to say good bye. Men and women cried like children at the thought that this family was about to make a dangerous journey of four to six weeks, exposed to the perils of the great Western wilderness.
He took his family to Monroe Township, Pope, Illinois, arriving within months of the 1820 US Census for that place. His first wife died shortly afterward and Pliny took his children and headed north up the Ohio River, perhaps with the idea of returning to Connecticut. However, he was detained for some reason around Cincinnati, Ohio. There he met Rachel Bennett, whom he married in September of 1821 in Warren County, Ohio.
In the 1820 US Census for Monroe Township. Pope, Illinois the family of Pliny Barnum is enumerated as follows:
Pg 77; Ln 6; Barnum, Pliny; 4 free white males to 10; 2 free white males 16 to 26; 1 free white female to 10; 1 free white female 16 to 26; 2 family members occupied in agriculture.
Pliny resided in Plumtrees early in his life.