“What was the first book published by Dr Seuss (Theodore Geisel)? And to Think I Saw it on Mulberry Street was published in 1937 by Vanguard Press, after being rejected by twenty-three other publishers.”
Excerpted from: Corey, Melinda, and George Ochoa. Literature: The New York Public Library Book of Answers. New York: Simon and Schuster, 1993.