二十年後
Twenty Years After () is a novel by Alexandre Dumas, first serialized from January to August 1845. A book of "The d'Artagnan Romances", it is a sequel to "The Three Musketeers" (1844) and precedes the 1847–1850 novel "The Vicomte de Bragelonne" (which includes the sub-plot "Man in the Iron Mask").