A celebrated author thus writes: "Posterity is under no obligations to a man who is not a parent, who has never planted a tree, built a house, nor written a book." Having fulfilled all these requisites to insure the remembrance of posterity, it remains to be seen whether the author's name shall escape oblivion. It may be that a few years will obliterate the name affixed to this Preface from the memory of man. This thought is the cause of no concern. I shall have accomplished my purpose if I can in some degree be humbly instrumental in serving my country and my generation, by promoting the well-being of my fellow-men, and advancing the declarative glory of Almighty God.