EDUCATING the Prince, † a new Festschrift in honor of Harvey C.  Mansfield, Jr., includes a list of his published work that attests to his prolific scholarship. But Mansfield has long had a reputation as an outstanding teacher as well. Thousands of Harvard undergraduates—among them, the presumptive princes of the book’s title—have had their mental horizons expanded (and their GPAs contracted) by attending his courses.  A much smaller number have worked with him on the doctoral level, and it is from these that the contributors are drawn.