A companion to the altar: shewing the nature and necessity of a sacramental preparation; in order to our worthy receiving the Holy Communion : Wherein those fears and scruples about eating and drinking unworthily, and of incurring our own damnation thereby, are proved [g]roundlers and unwarrantable. Unto which are added, prayers and meditations, preparative to a sacramental preparation, according to what the Church of England requires from her communicants.