More than 200 academics from the United States, Armenia, Turkey, and elsewhere have signed an open letter to the president of Armenia expressing their "grave concern" at the arrest and detention of a Ph.D. candidate from Duke University. The student, Yektan Turkyilmaz, a Turkish citizen, was arrested on June 17 as he was leaving Armenia for Turkey with about 100 secondhand books he had legally purchased. Mr. Turkyilmaz is a candidate for a degree in cultural anthropology, and his dissertation is to be called "Imagining 'Turkey,' Creating a Nation: The Politics of Geography and State Formation in Eastern Anatolia, 1908-1938."