The Regency period was one of the most turbulent ages in British history, one that spanned the French Revolution and the Napoleonic Wars, that witnessed unprecedented industrial progress, artistic accomplishment, and violent social unrest and--paradoxically--the most sparkling social scene English high society has ever enjoyed. Under the influence of the obese, loose-moraled Prince of Wales (to whom Jane Austen dedicated Emma), the Regency was the apex of British decadence, an era of lavish parties and relentless bed-hopping that set a standard for elegance and vulgarity. With...