The paper deals with Grahame Clark´s heavy commitments in Scandinavian archaeology all through his career. The rich Danish Mesolithic bog sítes opened his eyes for the possibility of finding Stone Age wetland sites also in Britain and of the archaeological potential of botany and other palaeo-environmental methods developed earlier in Scandinavia. Within short Clark blossomed out as the leading environmentalist of Stone Age research in north-western Europe. He did so thanks to his talent for both inter-disciplinary and multi-disciplinary work and by means of well planned fieldwork and publishing and through a stream of well-argued articles and books about almost eveery aspect of Stone age life in the area. The author also tries to characterize Clark as an archaeologist both against the background of his time and as a scholar in general.