Referring the reader to the Prolegomena for a connected view of the history of which this Apology is the primary source, it will suffice for our present purpose to enumerate the documents quoted, with the briefest possible statement of their contents and bearing upon the general purpose of the work. It should be noted that while in the first part the documents follow one another in strict chronological order, those of the second part fall into groups within which the matters are arranged as best suits the argument, and not in order of time. In the following list the probable or approximate date of each document is given.