I just stumbled across a little more info - a reviewer of one of Cairns’ books on Amazon claims “Earle E. Cairns is professor emeritus at Wheaton College in Wheaton, Illinois.” Wheaton is an Evangelical protestant liberal arts college. Wheaton is not very tolerant of Catholic beliefs - the college garnered some controversy in 2004 when it dismissed Joshua Hochschild (an assistant professor of philosophy) because he had converted to Catholicism.