This article is a condensation and paraphrase of Thomas Witherow's irrefutable little book, The Apostolic Church: Which Is It?, first printed in 1856, and reprinted several times from 1954 to 1983 by the Free Presbyterian Publications, 133 Woodlands Rd., Glasgow, Scotland. I do add some of my own remarks along with some quotes from The Book of Church Order of the Reformed Presbyterian Church, but the genius of the article is that of Witherow. Professor Thomas Witherow studied under the great Thomas Chalmers of Edinburgh. He became Pastor at Maghera, Ireland and Professor of Ecclesiastical History, Magee College, Londonderry, in 1856.