Secondly:  In treating of the written evidences of Christianity, next to their separate, we are to consider their aggregate authority.  Now, there is in the evangelic history a cumulation of testimony which belongs hardly to any other history, but which our habitual mode of reading the Scriptures sometimes causes us to overlook.  When a passage, in any wise relating to the history of Christ is read to us out of the epistle of Clemens Romanus, the epistles of Ignatius, of Polycap, or from any other writing of that age, we are immediately sensible of the confirmation which it affords to the Scripture account.  Here is a new witness.  Now, if we had been accustomed to read the Gospel of Matthew alone, and had known that of Luke only as the generality of Christians know the writings of the apostolical fathers, that is, had known that such a writing was extant and acknowledged; when we came, for the first time, to look into what it contained, and found many of the facts which Matthew recorded, recorded also there, many other facts of a similar nature added, and throughout the whole work the same general series of transactions stated, and the same general character of the person who was the subject of the history preserved, I apprehend that we should feel our minds strongly impressed by this discovery of fresh evidence.  We should feel a renewal of the same sentiment in first reading the Gospel of Saint John.  That of Saint Mark perhaps would strike us as an abridgment of the history with which we were already acquainted; but we should naturally reflect, that if that history was abridged by such a person as Mark, or by any person of so early an age, it afforded one of the highest possible attestations to the value of the work.  This successive disclosure of proof would leave us assured, that there must have been at least some reality in a story which not one, but many, had taken in hand to commit to writing.  The very existence of four separate histories would satisfy us that the subject had a foundation; and when, amidst the variety which the different information of the different writers had supplied to their accounts, or which their different choice and judgment in selecting their materials had produced, we observed many facts to stand the same in all; of these facts, at least, we should conclude, that they were fixed in their credit and publicity.  If, after this, we should come to the knowledge of a distinct history, and that also of the same age with the rest, taking up the subject where the others had left it, and carrying on a narrative of the effects produced in the world by the extraordinary causes of which we had already been informed, and which effects subsist at this day, we should think the reality of the original story in no little degree established by this supplement.  If subsequent inquiries should bring to our knowledge, one after another, letters written by some of the principal agents in the business, upon the business, and during the