must observe it on Saturday, often in all its Jewish strictness. This view, though it still appears in some Christian denominations, involves a virtual repudiation of the impact of Christianity on the weekly Sabbath. A second theory or, more accurately, group of theories may be described as ecclesiastical, or, as its exponents generally prefer that it be called, Dominical.4 These views all agree in maintaining that the fourth commandment and the Sabbath are strictly Mosaic in origin. They were mandated