Nature Trail heading west out of Oasis The Oasis Post Office operated from 1864 until 1871, when its name was changed to Graham; however the name changed back later in 1871, and the post office was then operational until 1920. William Jayne, the first settler in Graham Township, arrived in 1840 and owned land in Oasis, as did his brother Dr David Jayne of "Jayne Patent Medicine" fame. William's eldest son, also named William Jayne, died on 16 March 1897, and is buried in the Oasis Cemetery. His father died in 1880 and is buried in the Oakland Cemetery in
Iowa City, along with his wife Maria, the younger William's two brothers John and David, and sister Elizabeth. John's wife and their son Eben, Eben's wife Gertrude, and their three children Geraldine, Katheryne and John (with his wife Helen) are also buried in the Oakland Cemetery. Oasis' population was 130 in 1902, and was 115 in 1925. The population was 12 in 1940. ==Notes==