What does the Dr. Seuss timeline look like?

1904-born on March 2 1927-marries Helen Palmer 1931-mother dies 1937-publishes his first book 1954-publishes Horton Hears A Who 1957-becomes president of beginner books 1960-publishes Green Eggs And Ham 1967-wife Helen dies 1968-marries Audery Diamond 1984-wins the Pulitzer Prize 1991-dies on September 24