History of the Sabbath and first day of the week

The work surveys the origin and observance of the seventh-day Sabbath from the creation account through patriarchal, Mosaic, prophetic, and apostolic periods, presenting biblical evidence for continuous seventh-day practice. It then examines secular and early Christian writings to trace how first-day observance emerged, evaluating claims that attribute that practice to the apostles and weighing primary-source testimony. The narrative follows developments in the early church, the medieval era, and the Reformation, and concludes with discussion of later English and American defenders of seventh-day observance, contrasting documentary record with contested traditions.