There are three incidents recorded in Holy Scripture which may fairly, if with no great exactness, be termed astronomical miracles;--the "long day" on the occasion of Joshua's victory at Beth-horon; the turning back of the shadow on the dial of Ahaz, as a sign of king Hezekiah's recovery from sickness; and the star which guided the wise men from the east to the birthplace of the Holy Child at Bethlehem. As astronomy has some bearing on each of these three remarkable events, it will be of some interest to examine each of them from the point of view of our present astronomical knowledge. It does not follow that this will throw any new light upon the narratives, for we must always bear in mind that the Scriptures were not intended to teach us the physical sciences; consequently we may find that the very details have been omitted which an astronomer, if he were writing an account of an astronomical observation, would be careful to preserve. And we must further remember that we have not the slightest reason to suppose that the sacred historians received any supernatural instruction in scientific matters. Their knowledge of astronomy therefore was that which they had themselves acquired from education and research, and nothing more. In other words, the astronomy of the narrative must be read strictly in the terms of the scientific advancement of the writers. But there is another thing that has also to be remembered. The narrative which we have before us, being the only one that we have, must be accepted exactly as it stands. That is the foundation of our inquiry; we have no right to first cut it about at our will, to omit this, to alter that, to find traces of two, three, or more original documents, and so to split up the narrative as it stands into a number of imperfect fragments, which by their very imperfection may seem to be more or less in conflict. The scientific attitude with regard to the record of an observation cannot be too clearly defined. If that record be the only one, then we may accept it, we may reject it, we may be obliged to say, "We do not understand it," or "It is imperfect, and we can make no use of it," but we must not alter it. A moment's reflection will show that a man who would permit himself to tamper with the sole evidence upon which he purports to work, no matter how profoundly convinced he may be that his proposed corrections are sound, is one who does not understand the spirit of science, and is not going the way to arrive at scientific truth. There is no need then to inquire as to whether the tenth chapter of the Book of Joshua comes from two or more sources; we take the narrative as it stands. And it is one which has, for the astronomer, an interest quite irrespective of any interpretation which he may place upon the account of the miracle which forms its central incident. For Joshua's exclamation:-- "Sun, stand thou still upon Gibeon; And thou, Moon, in the valley of Ajalon,"