Arnold de Villa Nova, though excommunicated, was the physician of one pope; Roger Bacon, though harshly imprisoned, was the friend and correspondent of another. These incidents are not to be mistaken for that compassion which the truly great are ever ready to show to erring genius. They are examples of what we often see in our own day, when men engaged in the movements of a great political party loyally carry out its declared principles to their consequences, though individually they may find in those consequences many things to which they could mentally object. Their private objection they thus yield for the sake of what appears to them, in a general way, a practical good. Such was the state of affairs when the Arab element, having pervaded France and Italy, made its formal intellectual attack. It might almost have been foreseen in what manner that attack would be made, and the shape it would be likely to assume. Of the sciences, astronomy was the oldest and most advanced. [Sidenote: The intellectual impulse makes its attack through astronomy,] Its beginning dates earlier than the historic period, and both in India and in Egypt it had long reached correctness, so far as its general principles were concerned. The Saracens had been assiduous cultivators of it in both its branches, observation and mathematical investigation. Upon one point, the figure and relations of the earth, it is evident that not the slightest doubt existed among them. Nay, it must be added that no learned European ecclesiastic or statesman could deny the demonstrated truths. Nevertheless, it so fell out that upon this very point the conflict broke out. In India the Brahmans had passed through the same trial--for different nations walk through similar paths--with a certain plausible success, by satisfying the popular clamour that there was, in reality, nothing inconsistent between the astronomical doctrine of the globular form and movement of the earth, and the mythological dogma that it rests upon a succession of animals, the lowest of which is a tortoise. But the strong common sense of Western Europe was not to be deluded in any such idle way. It is not difficult to see the point of contact, the point of pressure with the Church. The abstract question gave her no concern; it was the consequences that might possibly follow. The memorable battle was fought upon the question thus sharply defined: Is the earth a moving globe, a small body in the midst of suns and countless myriads of worlds, or is it the central and greatest object in the universe, flat, and canopied over with a blue dome, motionless while all is in movement around it? [Sidenote: and the Church is defeated.] The dispute thus definitely put, its issue was such as must always attend a controversy in which he who is defending is at once lukewarm and conscious of his own weakness. Never can moral interests, however pure, stand against intellect enforcing truth. On this ill-omened question the Church ventured her