This little volume lays claim to no large amount of research or originality of treatment. It comprises the notes which I have used in lecturing to men at Oxford who were reading for the Honour School of Theology. It has no further aim than to furnish a convenient summary which may be of some service to any theological students who are interested in the period covered by its pages. I am very largely indebted throughout the book to the able monograph of M. Etienne Chastel, published at Geneva in 1850. Mr. S. G. Hamilton, of Hertford College, kindly read through the proofs for me.