"An enthusiast by nature" : growing up, 1822-1851
"The cause of future freedom' : Southern travels and journalism, 1852-1857
"A people's pleasure-ground" : conceiving Central Park, 1857-1861
"Heroes along with the rest" : Civil War service, 1861-1863
"There seems to be no limit" : California, 1863-1865
"Where talents and the needs of the world cross" : shaping the nation, 1865-1877
"I have all my life been considering distant effects" : summits and sorrows, 1877-1903.
