The Seventh Day Sabbath, a Perpetual Sign

The Seventh Day Sabbath, a Perpetual Sign is a practical theology work written by Joseph Bates, an American seaman and revivalist minister. He was a co-founder and developer of Sabbatarian Adventism, a strain of religious thinking that evolved into the Seventh-day Adventist Church.

Author's Preface:

"Remember the Sabbath day to keep it holy." "Six days work may be done, but the seventh is the Sabbath of the Lord thy God: in it thou shalt not do any work." This commandment I conceive to be as binding now as it ever was, and will be to the entering into the "gates of the city." 

I understand that the seventh day Sabbath is not the least one, among the all things that are to be restored before the second advent of Jesus Christ, seeing that the Imperial and Papal power of Rome, since the days of the Apostles, have changed the seventh day Sabbath to the first day of the week!