1810 - Thomas Agnew [b. 1794 in Liverpool], apprenticed to Vittore Zanetti, an art dealer in Manchester.
1817/1818 - Agnew made partner in Zanetti's firm.
1826 - Business moves from 94 Market Street, Liverpool to Exchange Street, Liverpool, and remained there until 1932.
1828 - V. Zanetti retires; his son Joseph continues in the business. Firm name changes to "Agnew and Zanetti".
1835 - Thomas Agnew becomes sole proprietor after J. Zanetti leaves firm.
1840 - William Lockett Agnew [b. 1825], Thomas' son, becomes an apprentice with the firm.
1851 - Agnew's sons William and Thomas taken into partnership.
1859 - Agnew's opens branch in Dale St., Liverpool.
1860 - Agnew's opens branch in London at 5 Waterloo Place.
1861 - Thomas Agnew (Sr.) retires.
1871 - Thomas Agnew (Sr.) dies.
1875 - London branch moves to 39 (now 43) Old Bond Street.
1895 - William Agnew retires; George Agnew becomes manager of Manchester branch (until 1902).
1896 - Walter Agnew becomes a partner in Christie's.
1904 - Gerald Agnew [1882-1954] joins firm.
1906 - Colin Agnew, son of George, joins firm.
1908 - Gallery in Berlin opened.
1909 - Liverpool branch (Dale St.) closes.
1913 - Morland Agnew [1855-1931] retires.
1918 - Lockett Agnew dies without heirs; Morland buys out Lockett's share and saves Company.
1919 - Paris branch re-opened.
1925 - Gallery in New York opened on 57th Street.
1931 - Manchester branch closed.
1931 - New York branch closed.
1946/c. 1965 - Very few American sales.
1963 - Managing directors: Colin Agnew, Hugh Agnew, Geoffrey Agnew, Richard Kinsett (great-grandson of William Agnew), Evelyn Joll (married one of William Agnew's great-granddaughters).