George III: A New Diagnosis : Recent research by medical scientists and historians suggests that George III had manic depression rather than porphyria.

George III was not suffering from porphyria as previously believed but from bi-polar syndrome and dementia says Timothy Peters, in History Today PG 4 Sept 0.

History Today - George III: A New Diagnosis : Recent research by medical scientists and historians suggests that George III had manic depression rather than porphyria. Scholars will need to take a fresh look at his reign, writes Timothy Peters.