The I. G. in Peking: Letters of Robert Hart; Chinese Maritiine Customs, 1868-1907. Two vols. Edited by John King Fairbank, Katherine Frost Bruner, and Elizabeth MacLeod Matheson, with an introduction by L. K. Little. Cambridge, Mass.: Harvard University Press, 1975. Pp. xxviii, 1625; illustrations, maps, and Chinese glossary. $50.00