Manly Halls "Lost Keys of Freemasonry" is a significant bit of explanatory lore regarding the path of the Freemasons and the various symbols and spiritual purposes of the masonic system. The basic concept of the legend of Hiram Abiff and its symbolic meaning (the three ruffians killing the same figure being human vices, in essence) is explained, along with an interpretation of the Emerald Tablet, among other fixtures.The concept of Masonry as a path separate from organized religion per se is explored here in some depth.