In the most comprehensive biographical study of John Purdue (c. 1802-1876) to date, Purdue's great-great-grandniece describes her travels to the diverse places where Purdue had lived in order to learn about the mysterious relative known in her family as Uncle. Using fresh, unpublished source materials-including Purdue's personal correspondence, business ledgers, and the family oral histories-the author examines Purdue's beginning among illiterate, immigrant, Pennsylvania mountain-hollow folks. Uncle challenges a commonly held belief that Purdue was a cold-hearted business mogul. Instead the author shows Purdue as a human being and as a generous family man with a visionary nature.