(D.) AUTHORITIES.
The remaining contemporary authorities are to be found in the letters of ambassadors, and the other diplomatic correspondence of the time. But it must be remembered that a statement can by no means be implicitly believed because it appears in such documents. The circumstances of the writer, his opportunities of obtaining information on the particular topic, his personal prejudices, the impression that he wished to convey to his correspondent, must all be allowed due weight. The correspondence and other information is largely contained in the following books:—