The first two books of Irenæus Against Heresies have been translated by Dr. Roberts. The groundwork of the translation of the third book, and that portion of the fourth book which is continued in this volume, has been furnished by the Rev. W. H. Rambaut. An attempt has been made, in rendering this important author into English, to adhere as closely as possible to the original. It would have been far easier to give a loose and flowing translation of the obscure and involved sentences of Irenæus; but the object has been studiously kept in view, to place the English reader, as much as possible, in the position of one who has immediate access to the Greek or Latin text.