William Stephen Marchant (1868 - 1925) Biography William Marchant was Director of the London branch of Goupil & Co. between 1900 and 1925, which exhibited artists such as Glyn Philpot, Walter Greaves, Augustus John, William Nicholson, William Orpen, Walter Sickert and Philip Wilson Steer. Details Related person / Organisation / Artist: Goupil Gallery (Goupil & Cie), London