Where does Harlan Hilburn attend college?

University of Mississippi (Oxford)

From the text:

Dad came home from the war, took one look at how tight I was with Grampa, another look at the South he hated, and used the GI Bill to go up to Ole Miss to get a master's degree in English so he could land a college teaching job out west, far away from Grampa, from Mississippi, from racism and prejudice, from hate.