Treating the least well researched period in the history of English, Richard Bailey's groundbreaking book is an admirable success: wry in its humor, clear in its science, and compelling in its humanity. More than that, it is a sterling achievement of research, a model for all who write about the history of spoken or written English, a benchmark of scope and insight. Bailey's calculations suggest that, in the course of the 19th century, the number of English speakers increased from 26 million to 126 million, helping to make the century the “most transforming” period in the history of English: it was transformed “from merely a language to a valuable property, firmly incorporated into capitalist economies. Far more than at any earlier time, English could be bought and sold. It was even possible to earn one's livelihood by working with it”.