My Great Aunt Sarah Ann Dillard married A.S Mcclure. It seems to me the McClures ran a ferry service across the Illinois river between Russellville, Illinois(Lawrence Co.) and Knox County Indiana. A lot of them lived in Vincennes. If you have the genealogical library at Genealogy.Com, Pull up the Haddon,McClure, Curry and Allied families. This will give you all he info you want.