Preface of the series editorsPreface of the authorAcknowledgements1. Introduction1.1. The relevance of a study of past mobility, contacts and transmission of knowledge1.2. Research area, materials and temporal scope1.3. Objective and research questions2. Previous research and state-of-the-art2.1. Handle cores2.2. Mesolithic mobility and contacts2.3. Mesolithic landscapes3. Theoretical framework3.1. Technology as a social phenomenon3.2. Transmission of knowledge – in theory and practice3.3. The theoretical framework for this study4. Methods4.1. The technological analysis4.2. Statistical analyses4.3. Methods to establish a handle core chronology5. Materials5.1. Focus areas within the research area5.2. Selection of materials and assemblages5.3. Representativity of the materials5.4. Site descriptions6. Results – Technology and chronology of the handle core concept6.1. The handle core concept6.2. Chronology of the concept7. Discussion7.1. New insights into the HCC, chronology and knowledge transmission7.2. The handle core vs. the single-fronted core7.3. Chronology of the handle core concept7.4. Knowledge transmission in Mesolithic Northern Europe7.5. A wider perspective on the use of single-fronted cores7.6. Outlook and future objectives8. Conclusions9. Summary9.1. Chapter 1 – Introduction9.2. Chapter 2 – Previous research9.3. Chapter 3 – Theoretical framework9.4. Chapter 4 – Methods9.5. Chapter 5 – Materials9.6. Chapter 6 – Results9.7. Chapter 7 – Discussion9.8. Chapter 8 – ConclusionsReferencesAppendix I – Data sets for cores and bladesAppendix II – Radiocarbon datesThis work deals with topics related to mobility, contacts and transmission of knowledge. The study of these topics regarding the past can promote an understanding of the social implications of migration, communication and learning today through long-term perspectives of change. This volume focuses on these topics in the Mesolithic by analysing a specialised lithic concept known previously from Scandinavia and Northern Germany. The implementation of the Handle Core Pressure Concept (HCPC) is based on a pressure technique to produce small regular blades from single-fronted cores, often utilised in slotted bone points. The use of pressure technique means that the HCPC requires social learning for maintenance and diffusion of the tradition.The research questions focus on three aspects of the HCPC: technology, chronology and the transmission of knowledge that are involved in the diffusion process. Materials from across Northern Europe have been studied and analysed. The results show that the morphology of the materials is similar across Europe, but that there are differences in the technological choices made by knappers in different parts of the area. These variations relate to the core preparation. The technological differences are also connected to two different chronologies that are centred east and west of the Baltic Sea, which would indicate two separate technological and social traditions.The cores east of the Baltic Sea still require more research in order to understand how they relate to other concepts in and around Northern Europe. The cores from Scandinavia, however, exhibit strong technological similarities to an older pressure-based blade concept that was already used in Scandinavia in the Early Mesolithic. The long-term use and the rapid diffusion of the HCPC indicate that knowledge and know-how must have diffused via both vertical and horizontal directionalities. These results exemplify the complex ways that mobility, social learning, material availability, tradition and many other aspects played a role in the transmission of knowledge in Mesolithic societies.