There was a Gilbert Barnes born in PA whose wife was named Catharine. In the 1850 US Census, he was 77 and his wife was 45. Someone named Margaret Sponsler who was 52 was living in the same household. At the time Gilbert and Catharine Barnes were living in Springfield, Sangamon, IL.
Someone submitted names of their children which is in the Pedigree Resource File. They are Mary Barnes and Daniel Barnes. No time frame is given for Mary, but Daniel's birth is shown to be 2 March 1807 and his death 13 June 1868. It is indicated that his father died 1858 at Sangamon, IL.