According to newspaper sources (apparently confirmed by the records of the Company of Cutlers), the founder was John Lockwood of Ecclesfield (himself the son of John), who was apprenticed to file maker John Burgin and became a Freeman in 1767, when he was assigned the mark ‘CX’ (information from Jeff Warner). Locksley & Lockwood, file makers of Butterthwaite, was listed in the 1787 directory using that mark. The founder apparently had two sons, John Lockwood Jun. (1769-15 October 1856) and William ....