Deceived, perhaps, by the vague titles, Mare Nubium, Mare Tranquillitatis, Mare Faecunditatis, etc., given to the dark spots by former astronomers, Mr. L. has entered into details regarding oceans and other large bodies of water in the moon; whereas there is no astronomical point more positively ascertained than that no such bodies exist there. In examining the boundary between light and darkness (in the crescent or gibbous moon) where this boundary crosses any of the dark places, the line of division is found to be rough and jagged; but, were these dark places liquid, it would evidently be even. The description of the wings of the man-bat, on page 21, is but a literal copy of Peter Wilkins’ account of the wings of his flying islanders. This simple fact should have induced suspicion, at least, it might be thought. On page 23, we have the following: “What a prodigious influence must our thirteen times larger globe have exercised upon this satellite when an embryo in the womb of time, the passive subject of chemical affinity!” This is very fine; but it should be observed that no astronomer would have made such remark, especially to any journal of Science; for the earth, in the sense intended, is not only thirteen, but forty-nine times larger than the moon. A similar objection applies to the whole of the concluding pages, where, by way of introduction to some discoveries in Saturn, the philosophical correspondent enters into a minute schoolboy account of that planet—this to the “Edinburgh Journal of Science!” But there is one point, in particular, which should have betrayed the fiction. Let us imagine the power actually possessed of seeing animals upon the moon’s surface—what would first arrest the attention of an observer from the earth? Certainly neither their shape, size, nor any other such peculiarity, so soon as their remarkable _situation_. They would appear to be walking, with heels up and head down, in the manner of flies on a ceiling. The _real_ observer would have uttered an instant ejaculation of surprise (however prepared by previous knowledge) at the singularity of their position; the _fictitious_ observer has not even mentioned the subject, but speaks of seeing the entire bodies of such creatures, when it is demonstrable that he could have seen only the diameter of their heads!