Queries in Church History

"S. of M." wishes to be informed at what date (as nearly as can be determined) the Bishop of Rome was acknowledged Supreme Head of the Catholic Church; and the most authentic History of the Church from the 1st to the 10th century? [The Editor has great pleasure in promoting such inquiries as the above, and in inserting Queries tending to promote them; but, with a view to the replies, he ventures to suggest that where a question involves the settlement of a good many disputed points, the best answer would be a concise statement of the opinions which have been held by those who have discussed su…