Charles H. Cosgrove is a professor of early Christian literature and the director of the PhD program at Garrett-Evangelical Theological Seminary, a union of schools descended from the institution founded by Eliza Garrett in 1853 and located on the campus of Northwestern University. He is the author of numerous books and articles in a wide range of fields, including theology, ethics, ancient music, and legal history. A lifelong native of the Chicago area, he is an aficionado of the city’s history and makes the occasional appearance in area music venues as a professional jazz trombonist.