On further enquiry I obtained the Patent No. 6762; but found that nothing practical had ever come of it. The pamphlet enclosed by Sir Rowland Hill in the above letter is entitled 'The Rotary Printing Machine.' It is very clever and ingenious, like everything he did. But it was still left for some one else to work out the invention into a practical working printing-press. The subject is fully referred to in the 'Life of Sir Rowland Hill' (i. 224,525). In his final word on the subject, Sir Rowland "gladly admits the enormous difficulty of bringing a complex machine into practical use," a difficulty, he says, which "has been most successfully overcome by the patentees of the Walter Press." CHAPTER VIII. WILLIAM CLOWES: INTRODUCER OF BOOK-PRINTING BY STEAM. "The Images of men's wits and knowledges remain in Books, exempted from the wrong of time, and capable of perpetual renovation. Neither are they fitly to be called Images, because they generate still, and cast their seeds in the minds of others, provoking and causing infinite actions and opinions in succeeding ages; so that, if the invention of the Ship was thought so noble, which carrieth riches and commodities from place to place, and consociateth the most remote Regions in participation of their Fruits, how much more are letters to be magnified, which, as Ships, pass through the vast Seas of time, and make ages so distant to participate of the wisdom, illuminations, and inventions, the one of the other?"--Bacon, On the Proficience and Advancement of Learning. Steam has proved as useful and potent in the printing of books as in the printing of newspapers. Down to the end of last century, "the divine art," as printing was called, had made comparatively little progress. That is to say, although books could be beautifully printed by hand labour, they could not be turned out in any large numbers. The early printing press was rude. It consisted of a table, along which the forme of type, furnished with a tympan and frisket, was pushed by hand. The platen worked vertically between standards, and was brought down for the impression, and raised after it, by a common screw, worked by a bar handle. The inking was performed by balls covered with skin pelts; they were blacked with ink, and beaten down on the type by the pressman. The inking was consequently irregular. In 1798, Earl Stanhope perfected the press that bears his name. He did not patent it, but made his invention over to the public. In 1818, Mr. Cowper greatly improved the inking of formes used in the Stanhope and other presses, by the use of a hand roller covered with a composition of glue and treacle, in combination with a distributing table. The ink was thus applied in a more even manner, and with a considerable decrease of labour. With the Stanhope Press, printing was as far advanced as it could possibly be by means of hand labour. About 250 impressions could be taken off, on one side, in an hour.