Professor Castle teaches U. S. history and philosophy at Hawaii Pacific College. Under grant support from the Hoover Presidential Library Association, the National Endowment for the Humanities, and the William Coolidge Fellowship program at the Episcopal Divinity School, Castle has pursued research in U. S. diplomatic history with a focus on U. S.- Japan relations. Among his published works are Philosophers at Work, Pacific Historical Review, Southwest Philosophical Studies, and Studies in American Humor. Alfred Castle is the grand-nephew of William R. Castle, Jr. He has drawn on the Castle Papers at the Hoover Presidential Library and the Castle diaries at Harvard University for his research.