A tercentenary conference of March, 1985, drew to Newport, Rhode Island, nearly all the most distinguished Berkeley scholars now active. The conference was organized by the International Berkeley Society, with the support of several institutions and many people (whose help is acknowl­ edged below). This volume represents a selection of the lead papers deliv­ ered at that conference, most now revised. The Cartesian marriage of Mind and Body has proved an uneasy union. Each side has claimed supremacy and usurped the rights of the other. In anglophone philosophy Body has lately had it all pretty much its own way, most dramatically in the Disappearance Theory of