[Inner Traditions] Reveals how Stonehenge was an extraordinary astronomical calendar used in the cultivation of ingredients for long-forgotten botanical cures • Explores how Stonehenge and other stone circles were ancient healing sanctuaries and celestial calculators for the preparation of natural medicines • Explains how the megalithic priesthood--and their successors, the Druids--developed astonishing memory techniques to preserve knowledge over generations • Draws upon the very latest discoveries from recent archaeological excavations and overlooked historical source material Stonehenge is just one of thousands of stone circles erected throughout Britain and Ireland for over three millennia from 3,000 BC on. How did this building tradition survive for so long, over such a large area and with such complexity and uniformity, when the people of the British Isles lived in separate, isolated communities and left no evidence of a central leadership or obvious communicat