kaylee 38 [http://kaylee38.homestead.com/Lavena.html] has the following:
"When Eli's father, Elias, died on November 30, 1837, Eli was awarded custody of two of his younger brothers, Lewis E. and William Riley Chaffin. They all moved to Texas about 1840 and settled on the Anderson/Houston County lines where Eli obtained 640 acres of land, half in each county. This was patented on November 7, 1849 and was refered to as the Eli Chaffin Survey."
The Illinois State Archives [http://www.sos.state.il.us/GenealogyMWeb/landsrch.html] record a land sale to Eli Chaffin (is it the same person?) in Clinton Co. on 10/25/1823 (40 acres @ $1.25/acre: SWNE, Sect. 25, Twnshp 02N, Range 05W, Meridian 3).