In partnership with Arthur Shean Newman (1828–1873) from 1860 as Newman & Billing. On Newman’s death Billing took on Newman’s son, Arthur Harrison Newman (1855–1922), as his apprentice. In 1890 he took his son Arthur Ernest Billing (1857–1920) into partnership; they were joined by Joseph William Rowley in 1893, the practice title then becoming Arthur Billing Son & Rowley. Billing retired in 1894.