[Professor W. C. Roberts-Austen, C.B., F.R.S., chemist to the Royal Mint, refers to Pepys’s Diary and to Blondeau’s machine in his Cantor Lectures on “Alloys used for Coinage,” printed in the “journal of the Society of Arts” (vol. xxxii.).  He writes, “The hammer was still retained for coining in the Mint in the Tower of London, but the question of the adoption of the screw-press by the Moneyers appears to have been revived in 1649, when the Council of State had it represented to them that the coins of the Government might be more perfectly and beautifully done, and made equal to any coins in Europe.  It was proposed to send to France for Peter Blondeau, who had invented and improved a machine and method for making all coins ’with the most beautiful polish and equality on the edge, or with any proper inscription or graining.’  He came on the 3rd of September, and although a Committee of the Mint reported in favour of his method of coining, the Company of Moneyers, who appear to have boasted of the success of their predecessors in opposing the introduction of the mill and screw-press in Queen Elizabeth’s reign, prevented the introduction of the machinery, and consequently he did not produce pattern pieces until 1653 . . . .  It is certain that Blondeau did not invent, but only improved the method of coining by the screw-press, and I believe his improvements related chiefly to a method for ’rounding the pieces before they are sized, and in making the edges of the moneys with letters and graining,’ which he undertook to reveal to the king.  Special stress is laid on the engines wherewith the rims were marked, ’which might be kept secret among few men.’  I cannot find that there is any record in the Paris mint of Blondeau’s employment there, and the only reference to his invention in the Mint records of this country refers to the ‘collars,’ or perforated discs of metal surrounding the ‘blank’ while it was struck into a coin.  There is, however, in the British Museum a Ms. believed to be in Blondeau’s hand, in which he claims his process, ’as a new invention, to make a handsome coyne, than can be found in all the world besides, viz., that shall not only be stamped on both flat sides, but shall even be marked with letters on the thickness of the brim.’  The letters were raised.  The press Blondeau used was, I believe, the ordinary screw-press, and I suppose that the presses drawn in Akerman’s well-known plate of the coining-room of the Mint in the Tower, published in 1803 [’Microcosm of London,’ vol. ii., p. 202], if not actually the same machines, were similar to those erected in 1661-62 by Sir William Parkhurst and Sir Anthony St. Leger, wardens of the Mint, at a cost of L1400, Professor Roberts-Austen shows that Benvenuto Cellini used a similar press to that attributed to Blondeau, and he gives an illustration of this in his lecture (p. 810).  In a letter to the editor the professor writes:  “Pepys’s account of the operations of coining, and especially