The substance of Christian religion: or, A plain and easie draught of the Christian catechisme, : in LII. lectures, on chosen texts of Scripture, for each Lords-day of the year, learnedly and perspicuously illustrated with doctrines, reasons and uses. By that reverend and worthy laborer in the Lord's vineyard, William Ames, Doctor in Divinity, and late professor thereof, at Franeker in Friezeland