1968 concerts added: Simon & Garfunkel in Davenport

Another one could be added to the list, with thanks to eBay!

1968-02-08 Davenport, MI, Davenport College, Civic Auditorium
(do note the wrong spelling of Garfunkel’s name!)

and Joe McMichael found this one:

1968-10-12 Durham, NC,  Duke University