In 1600 Sheffield became celebrated for its tobacco-boxes and Jew's-harps. The town was as yet of small size and population; for when a survey of it was made in 1615 it was found to contain not more than 2207 householders, of whom one-third, or 725, were "not able to live without the charity of their neighbours: these are all Begging poor."* [footnote... The Rev. JOSEPH HUNTER, History of Hallamshire. ...] It must, however, have continued its manufacture of knives; for we find that the knife with which Felton stabbed the Duke of Buckingham at Portsmouth in 1628 was traced to Sheffield. The knife was left sticking in the duke's body, and when examined was found to bear the Sheffield corporation mark. It was ultimately ascertained to have been made by one Wild, a cutler, who had sold the knife for tenpence to Felton when recruiting in the town. At a still later period, the manufacture of clasp or spring knives was introduced into Sheffield by Flemish workmen. Harrison says this trade was begun in 1650. The clasp-knife was commonly known in the North as a jocteleg. Hence Burns, describing the famous article treasured by Captain Grose the antiquarian, says that--