The coming storm of modernism (1893) -- Conservation frames (1910) -- Before the Armory (1913) -- Outside the Armory (1912-1913) -- Mechanics of the New York secession (1915) -- Days in April, sweet and cruel (1917) -- The serial portrait (1917-1935) -- Down from the clouds (1929-1935) -- Conclusion: the secession's unyielding father.