An examination of a late book published by Doctor Owen, concerning a sacred day of rest : Many truths therein as to the morality of a Christian sabbath, assented to. With a brief inquiry into his reasons for the change of it, from the seventh day to the first; by way of denial. As also, the consent of Doctor Heylin, and others, touching the time and manner of that charge. With an inquiry into the nature of his assertions, about the first and second covenant. By William Sellers.