In 1789 a book was published at Dresden by M. I. F. Freyhere in which another endeavor was made to unravel the mystery. Mr. Freyhere’s book was a pretty large one, and copiously illustrated by colored engravings. His supposition was that “a well-taught boy very thin and tall of his age (sufficiently so that he could be concealed in a drawer almost immediately under the chess-board”) played the game of chess and effected all the evolutions of the Automaton. This idea, although even more silly than that of the Parisian author, met with a better reception, and was in some measure believed to be the true solution of the wonder, until the inventor put an end to the discussion by suffering a close examination of the top of the box. These bizarre attempts at explanation were followed by others equally bizarre. Of late years however, an anonymous writer, by a course of reasoning exceedingly unphilosophical, has contrived to blunder upon a plausible solution—although we cannot consider it altogether the true one. His Essay was first published in a Baltimore weekly paper, was illustrated by cuts, and was entitled “An attempt to analyze the Automaton Chess-Player of M. Maelzel.” This Essay we suppose to have been the original of the _pamphlet to _which Sir David Brewster alludes in his letters on Natural Magic, and which he has no hesitation in declaring a thorough and satisfactory explanation. The _results _of the analysis are undoubtedly, in the main, just; but we can only account for Brewster’s pronouncing the Essay a thorough and satisfactory explanation, by supposing him to have bestowed upon it a very cursory and inattentive perusal. In the compendium of the Essay, made use of in the Letters on Natural Magic, it is quite impossible to arrive at any distinct conclusion in regard to the adequacy or inadequacy of the analysis, on account of the gross misarrangement and deficiency of the letters of reference employed. The same fault is to be found in the “Attempt &c.,” as we originally saw it. The solution consists in a series of minute explanations, (accompanied by wood-cuts, the whole occupying many pages) in which the object is to show the _possibility _of _so shifting the partitions _of the box, as to allow a human being, concealed in the interior, to move portions of his body from one part of the box to another, during the exhibition of the mechanism—thus eluding the scrutiny of the spectators. There can be no doubt, as we have before observed, and as we will presently endeavor to show, that the principle, or rather the result, of this solution is the true one. Some person is concealed in the box during the whole time of exhibiting the interior. We object,