The Casebooks Project centres on one of the largest surviving sets of medical records in history. Between 1596 and 1634 the notorious London astrologer, Simon Forman, and his protégé Richard Napier, a shy Buckinghamshire clergyman, recorded 80,000 consultations. A decade ago, we piloted Casebooks with an excel spread sheet. Now it is a pioneering digital humanities project with a dataset, a web-based search interface and image viewer framed within explanatory documentation and shaped by a programme of academic and public engagement. As the project nears completion, this talk reflects on its lessons for the histories of science and medicine and its implications for future work in the field.