Certainly, as applied to _manuscripts_, the phrase “_jettez en molle_” has no meaning. But with all deference to Mr. Blades, whose “Life and Typography of William Caxton,” is a work of the highest possible merit with reference to all that concerns the introduction of Printing into England,--the words in question are pregnant with meaning in regard to both block-printing and stencilling. Every one acquainted with the ordinary processes of printing must know, that freshly-printed paper has exactly the appearance of having been moulded; the damped paper, in fact, is actually moulded on the type or wood-engraving, by the forcible pressure brought to bear upon it, and on being released from that pressure, the paper cast that has been made brings away with it, on removal, the colouring matter with which the blocks or types have been inked. In the old solid blocks, when the hollows cut to leave in relief the characters used for the School-books--the Donatuses and Doctrinals--would be wider, deeper, and more irregular than in the more modern types, this indented and moulded appearance would be much more apparent, especially when impressions were taken by the Chinese method of rubbing the back of the paper, and the printer was careless about smoothing out and obliterating the evidences of indentation, in the manner adopted by typographers now-a-days. In stencilling too, the perforated plate, when laid upon the paper, became to all intents and purposes a mould. The bottom of the mould was the surface of the paper on which, through the perforations in the plate, the ink or pigment would be brushed, the paper being thus made to take a coloured cast of the hollows in the plate. With reference to either process therefore, the phrase “_jettez en molle_” might most naturally be used to express on the part of any one ignorant of the process of printing, the appearance of a book which he knew was not written, but which bore upon its face the evidence of having, in some way or other, been cast or moulded. As this evidence would appear the same, or nearly so, whether produced from engraved blocks, or from separable letters, the phrase would be just as applicable in the one case as in the other. When thus examined, the assertion that “_jettez en molle_” means, and can only mean, “_printed from cast types_,” is deprived of all its weight, and the phrase itself is valueless as an evidence that cast types were in use at Bruges, or elsewhere in Holland, at the time when Abbé Jean le Robert wrote his diary. Xylographic and typographic productions, as well as that edition of the Mirror of Human Salvation which partook of the nature of both, may therefore be described alike, as books “jettez en molle.”