This book presents writings produced by the Muggletonians---an unusual seventeenth-century English sect founded in 1652 by John Reeve and Lodowick Muggleton. The volume draws on documents from a recently discovered Muggleton archive and rare seventeenth-century tracts. Among those included are Muggleton's autobiography, excerpts from works co-written by Muggleton and Reeve, letters, songs (including ones composed to celebrate Muggleton's release from prison), and miscellany.

The mid-seventeenth century saw both the expansion of the Baptist sect and the rise and growth of Quakerism. At first, the Quaker movement attracted some Baptist converts, but relations between the two groups soon grew hostile. Public disputes broke out and each group denounced the other in polemical tracts. Nevertheless in this book, Underwood contends that Quakers and Baptists had much in common with each other, as well as with the broader Puritan and Nonconformist tradition. By examining the Quaker/Baptist relationship in particular, Underwood seeks to understand where and why Quaker views diverged from English Protestantism in general and, in the process, to clarify early Quaker beliefs.