either a Jew or a Seventh-day Adventist. I am neither. But in the eyes of many, these are the only religions observing the Seventh-Day Sabbath.Most people have heard of Orthodox, Conservative, and Reform Jews. The well-known Seventh-day Adventists number in the millions. Yet most Seventh-day Adventists know little or nothing of the hundreds of other Sabbath-keeping groups who believe the Messiah has come. For a listing, with addresses and in many cases a summary of their distinctive doctrines, write for the Directory of Sabbath-Observing Groups, from the Bible Sabbath Association, 3316 Alberta Drive, Gillette, WY 82718.Seventh-day Adventists should know more about others who hold very similar beliefs. Their fellow Sabbath-keepers live in the same communities as Adventists, yet in many cases neither knows about the existence of the other. Both know little about the doctrinal beliefs or the history of the other. This is really not too surprising. The typical Protestant or Catholic knows little about the history and doctrines of his own denomination, let alone that of another. Few will bother to know what their church believes, fewer still will find out what others believe.I have written extensively on Sabbatarian history and have closely examined Adventist doctrine, as well as that of many other Sabbath-observing groups. There are very sincere and dedicated Seventh-day Adventists. I share many beliefs with Adventists. Yet they are lacking in two areas: (1) Adventists need to know their own history, and (2) Adventists need to know their fellow Sabbath-keepers and their doctrines.Unknown HistoryThe oldest continuously organized and operating Christian Sabbath-keeping church, the Mill Yard Church in London, England, is not, and never was, Seventh-day Adventist. The first Christian Sabbath-keeper on the American continent came about 200 years before there was a Seventh-day Adventist. The first Sabbath-keeping settler in the Oregon country was not an Adventist either.There has never been a time since the Seventh-day Adventist church was formed in the 1860s that all Christian Sabbath-keepers were in their fold. The Seventh-day Adventist Church is not the only descendant of the Adventist movement led by the Sunday-keeping William Miller in the 1840s. The largest non-SDA body of Sabbath-keepers, the various Churches of God, were not an "offshoot" of the Seventh-day Adventists, but existed long before the SDA denomination was formed. They parted company over the visions of Ellen G. White and various other doctrinal views.I urge that my SDA friends read my two books: History of the Seventh Day Church of God, Volume I, and Six Papers on the History of the Church of God, available from: Giving & Sharing, PO Box 100, Neck City, Missouri 64849. The SDA Loma Linda and James Andrews Universities have requested these books.Regretfully, the history of SDAs and non-SDAs has been marked by much dissension and mutual name-calling. SDA official writings have denounced those in the Church of God as "fanatics" and "rebels," who in turn denounced Ellen G. Whites visions as from the devil. Her husband James White referred to Church of God people as "bold slanderers" and "baptized liars."But then there are many Sabbath-keepers who have never had close