Mary Hallam was listed in the Sheffield directory (1774) as a lancet and phleme maker at Norfolk Street (trade mark ‘PARIS’). She was likely a widow, who was continuing her husband’s business. His identity is uncertain, though one candidate, Benjamin Hallam, was buried at St Paul’s churchyard on 29 August 1772. Mary was listed at the same address in the next Sheffield directories in 1787 and 1797. In 1787, she appeared alongside James Hallam as a lancet maker: both used v....