Mr. John Sadler was, according to Mr. Mayer, the first person who applied the art of printing to the ornamentation of pottery, and the story of his discovery is thus told:--Sadler had been in the habit of giving waste and spoiled impressions from his engraved plates to little children, and these they frequently stuck upon pieces of broken pot from the pot-works at Shaw’s Brow, for their own amusement, and for building dolls’ houses. This circumstance gave him the idea of ornamenting pottery with printed pictures, and, keeping the idea secret, he experimentalised until he had nearly succeeded, when he mentioned the circumstance to Guy Green, who had then recently succeeded Mr. Adam Sadler in his business. Guy Green was a poor boy, but spent what halfpence he could get in buying ballads at the shop of Adam Sadler. Sadler liking the lad, who was intelligent beyond his age or his companions, took him into his service and encouraged him in all that was honourable. John Sadler having, as I have said, mentioned his discovery to Guy Green, the two “laid their heads together,” conducted joint experiments, and having ultimately succeeded, at length entered into partnership. This done, they determined to apply to the king for a patent; which, however, under the advice of friends, was not done. The art was first of all turned to good account in the decoration of tiles--“Dutch tiles,” as they are usually called--and the following highly interesting documents relating to them, which are in the possession of Mr. Mayer, and to whom the antiquarian world is indebted for first making them public, will be read with interest:-- “I, John Sadler, of Liverpoole, in the county of Lancaster, printer, and Guy Green, of Liverpoole, aforesaid, printer, severally maketh oath that on Tuesday, the 27th day of July instant, they, these deponents, without the aid or assistance of any other person or persons, did within the space of six hours, to wit, between the hours of nine in the morning and three in the afternoon of the same day, print upwards of twelve hundred Earthenware tiles of different patterns, at Liverpoole aforesaid, and which, as these deponents have heard and believe, were more in number and better and neater than one hundred skilful pot-painters could have painted in the like space of time, in the common and usual way of painting with a pencil; and these deponents say that they have been upwards of seven years in finding out the method of printing tiles, and in making tryals and experiments for that purpose, which they have now through great pains and expence brought to perfection. “JOHN SADLER., “GUY GREEN. “Taken and sworn at Liverpoole, in the county of Lancaster, the second day of August, one thousand seven hundred and fifty-six, before William Statham, a Master Extraordinary in Chancery.”