George Routledge set up business as a retail bookseller with his brother-in-law W. H. Warne as assistant in 1836. W. H. Warne was made a partner in 1848 and, after his brother Frederick Warne was made a partner in 1851, the firm was renamed George Routledge & Company. The firm moved to Farringdon Street in 1852 and opened a New York branch in 1854. Robert Warne Routledge, George Routledge's son, entered the partnership in 1858 and the firm was renamed Routledge, Warne & Routledge.