"The Complete Testimony of the Fathers of the First Three Centuries Concerning the Sabbath and First Day" by Eld. J. N. Andrews is a historical account written in the late 19th century. The work delves into the perspectives of early Christian writers regarding the observance of the Sabbath and the first day of the week, exploring historical testimonies and scriptural interpretations. It likely aims to defend the significance of the seventh-day Sabbath and challenge the validity of Sunday observance as a Christian mandate. The opening of the work presents a comprehensive preface, laying the groundwork for the exploration of these early testimonies about the Sabbath. It identifies three groups within the religious community: those who uphold the seventh-day Sabbath, those who observe Sunday, and those who reject the concept of a Sabbath altogether. Andrews argues that there is a lack of biblical support for the transition from the Sabbath to Sunday and emphasizes a need to examine the writings of early church fathers for clarity. These writings, according to him, often contradict the claims of those who advocate for Sunday as the Christian Sabbath, underscoring much debate and division in early Christianity concerning this topic. (This is an automatically generated summary.)