Clavis coeli; or A treatise setting forth the nature, the parts, and kinds of prayer : with the efficients thereof: the object of prayer; the matter of prayer; the time and place of prayer; the gestures to be used in prayer; the necessity, excellency and profit of prayer: with directions for the manner how we ought to pray. Many weighty questions discussed, and divers cases cleered. By William Gearing minister of the Word.