The _Speculum_ was printed at different times and places during the fifteenth century,[134] but the copies of greatest value are those which belong to four correlated editions—two in Latin, and two in Dutch—all without date, name, or place of printer. In these four editions the illustrations are obviously impressions from the same blocks; but each edition exhibits some new peculiarity in the shape or disposition of the letters. Those who favor the theory of an invention of typography in Holland maintain that these letters are the impressions of the first movable types, and that the curious workmanship of the book marks the development of printing at the great turning-point in its progress when it was passing from xylography to typography. As important conclusions have been drawn from the peculiarities of each edition, it is necessary that they should be described with precision. The order in which the four editions were actually printed is not certainly known. Six eminent bibliographers have arranged them in as many different orders. The order assigned to them here [p270] is purely conjectural, but it is based on the supposition that that should be the first edition in which the wood-cuts show the sharpest lines, and that the last in which the types and wood-cuts show the strongest marks of wear. The _First Edition_ is in Latin. Each copy of the book is made up of sixty-three leaves of small folio printed upon one side of the paper, but with printed pages facing each other, after the style of the block-books. The space occupied by the printed page is about 7-3/4 inches wide, and 10-1/4 inches high. The preface, in rhyme, is composed in broad measure, and occupies five pages. The fifty-eight pages of text that follow are also in rhyme; but they are made up with two columns to the page. At the top of each page is an engraving on wood, containing, on one block, two distinct designs, separated from each other by the pillar of an architectural frame-work. At the bottom of each design, and engraved upon the same block, is a line in Latin, which explains the design, and which serves as the text for the verses underneath. The letters of the preface and the text are impressions from Pointed Gothic types of the Flemish style. Every line of verse begins with a capital letter. The only mark of punctuation is the period, but it is rarely used. The book is without title, paging-figures, signatures, or catch-words. The wood-cuts are in brown, and the types in black ink. The brown ink is a water color which can be partially effaced by rubbing with a moist sponge; the black ink is an oil color, for it has stained the paper with the pale greenish tinge of badly prepared oil. As the back of every printed wood-cut is smooth and shining, while the back of every type-printed page is rough and deeply indented, it is obvious that the types of the text were not only printed with a different ink, but by a separate impression,