My first duty is to thank the President and Council of the Society for the honour they have conferred on me in inviting me to read a paper on this important and controversial subject, "The Problem of Revaluation." You may have revaluation for many different purposes but tonight our sole concern is with rateable valuations, and the views I express are purely personal. Our subject falls naturally under two main heads--firstly, the origin, extent and nature of our existing valuations, and secondly, the changes that would be wrought in the existing system by a revaluation.