Thomas (Milner) Frost (1844-1913) was the son of John (a spring blade grinder) and his wife, Mary.  The family lived at Matilda Street in the 1850s and 1860s, where Thomas began work as a pen blade grinder.  In 1868, he was listed in a directory as manufacturer of flied blades and springs, Union Lane.  He continued to trade at Union Works, Union Lane, into the early years of the twentieth century.  He was a manufacturer of pen, pocket, and champagne knife scales, springs, blades, and shields.  He lived at St Mary’s Road.  In 1899, the firm was sued by table knife flyer, Edward Corrie, after he lost the ends off three fingers.  He was awarded £10 and costs (Sheffield Evening Telegraph, 26 October 1899).

Thomas Milner Frost died on 30 December 1913, aged 69, and was buried at the General Cemetery.  He left £1,939.  A sale of materials and warehouses fixtures was advertised.  In 1914, Thomas Frost & Co Ltd was registered as a private limited company, with £1,000 capital, at Union Works, Bailey Lane.  It manufactured cutlery materials, metal castings, and forgings.  The subscribers and directors were Thomas H. Flynn (a clothier), William Rhodes (bone merchant), and Henry Crookes (bone merchant).  The firm traded as a table blade forger during the 1920s, but became defunct in the following decade.  It was acquired by Harrison Fisher.