Two identical study days. The LAARC holds thousands of clay tobacco pipes, representing dozens of London makers and enabling us to trace the evolution of this commonplace artefact from before 1600 until after 1850. We are currently creating a new reference collection, initially comprising over 500 individual pipes, which will be completed in March 2012 and used for the first time during these two study days. There will be a strong emphasis on practical activities, handling and studying the original artefacts, and so we are restricting the number of participants on each day to just 12. Second session.