John Anderson was a minister of the General Associate (Anti-Burgher) Synod in Scotland, and later a minister and professor of the Associate Presbytery of Pennsylvania (which became the Associate Synod of North America). The following work deals with questions concerning the proper administration of the LordÕs Supper, most notably the question of frequency. In doing so, he defends what many regard as simply a tradition of Presbyterian Scotland --- observing days of fasting and thanksgiving in connection with the observance of that sacrament --- but which he demonstrates to be clearly warranted by the Word of God. He especially takes to task the work of John M. Mason (1770-1829), then a minister of the Associate Reformed Church, who had just written an anonymous work in defense of observing the LordÕs Supper whenever the church meets together.