""A Discourse On The Duties And Instruction Of The Various Grades Of Ancient And Primitive Masonry"" is a book written by John Yarker, which provides a comprehensive guide to the various grades of ancient and primitive Masonry. The book is divided into several sections, each of which focuses on a specific aspect of Masonry, ranging from the history and origins of the craft to the duties and responsibilities of its members.The author examines the various...