OSCEOLA: THE UNCONQUERED INDIAN, by William and Ellen Hartley, reviewed by John K. Mahon; BIG CYPRESS: A CHANGING SEMINOLE COMMUNITY, by Merwyn S. Garbarino, reviewed by Harry A. Kersey, Jr.; HISTORIA DEL DESCUBRIMIENTO DE LA FLORIDA Y BEIMENI O YUCATAN, (Boletin de la Academia Puertorriquena de la Historia), by Aurelio Tío, reviewed by C. W. Arnade; FLOOD TIDE OF EMPIRE: SPAIN AND THE PACIFIC NORTHWEST, 1543-1819, by Warren L. Cook, reviewed by Jack D. L. Holmes; ARMS FOR EMPIRE: A. MILITARY HISTORY OF THE BRITISH COLONIES IN NORTH AMERICA, 1607-1763, by Douglas Edward Leach, reviewed by T. Harry Williams; BRITISH TRAVELERS AMONG THE SOUTHERN INDIANS, 1660-1763, by J. Ralph Randolph, reviewed by Helen Hornbeck Tanner; THE FAITHFUL SHEPHERD...