THE middle and late years of the nineteenth century were times of great economic, social, and physical change in American cities: commerce was being challenged by industry, new residents were outnumbering the old, and the size and appearance of cities were being altered considerably. Most significant to many older urban dwellers was that the character of their cities was changing, and changing for the worse. The new migrants, who were poor and uneducated, certainly did not uphold the genteel traditions of former years. Suddenly, or so it seemed, vice, crime, and corruption became major problems. Reformers cried out about the evils of city life and sought to cleanse the environment. Among eastern cities, New York acquired the unenviable reputation of being a New World Sodom. Yet to Boston the problem seemed more acute. Bostonians, proud of their Puritan heritage, considered themselves intellectually and morally superior to New Yorkers. Still, the population of the Athens of America was different from that of earlier years. The old Protestant stock was being diluted by an influx of Irish Catholics, and erosion of the Puritan ideal seemed sure to follow. Nonetheless, while Bostonians worried about attacks on their moral fortress, most of them clung to a belief in their city's essential purity. Their belief was soon challenged. In Boston, too, reformers discovered wickedness, and the most outspoken critic was the immensely popular, self-styled Poor Man's Preacher, the Reverend Henry Morgan. Born in Newtown, Connecticut, in 1825, Morgan spent his early adulthood as an itinerant temperance preacher, traveling through several northern and southern East Coast states. He spoke wherever he could find an audience, but he was most interested in carrying his message to the inmates of penal