Ken Kershaw continues his amazing output of plating information on classic Prince Edward Island stamp. In this book he concludes that only one die, not three as suggested earlier, was used to produce the plates.Ken Kershaw was born in England and became fascinated by plants at an early age. He graduated from Manchester University with a B Sc degree in Botany in 1952. After military service he went on to a Ph. D.degree working on pattern in vegetation, and was appointed lecturer in Plant Ecology at Imperial College London in 1957. He was seconded to Ahmadu Bello University in northern Nigeria for two years. On his return to Imperial College he became involved with lichen ecology, particularly in alpine and arctic areas, in addition to his work on computer modeling and data analysis. He obtained his D Sc in 1965 and was appointed Professor at McMaster University, Hamilton in 1969. His research was then devoted heavily to the ecology of the Canadian low arctic and northern boreal forest areas, and in 1982 he was elected a fellow of the Royal Society of Canada. He is the author of several university texts.Ken’s passion for wild plants has been transferred to Canadian philately. He sees his plating work simply as the “taxonomy of bits of paper” and after a lifetime of plant taxonomy finds it a fairly straightforward and fascinating hobby.