Most Presbyterians are familiar with the Westminster Shorter/Larger Catechisms, or the Heidelberg Catechism. But have you heard of Ecclesiastical Catechisms? At least two were written by Presbyterians in America in the 19th century: one by Alexander McLeod (1806) and one by Thomas Smyth (1843). These books present the doctrine of the church in question and answer format, so that God's people might more easily understand what the Scriptures teach about the institution that Jesus is building. McLeod and Smyth won't agree on everything (for instance, the number of offices Jesus has appointed in His church), so comparing and contrasting these two documents, written 40 years apart, will undoubtedly be an edifying and rewarding use of your time.