Christopher Marlowe was the author of the play The Tragical History of Doctor Faustus, often abbreviated to just Faust, which the Scarecrow is quoting.
Read The Tragical History of Doctor Faustus at Project Gutenberg.
Dee quotes a famous line from the movie The Wizard of Oz.
Harvey Dent, or Two-Face, is one of Batman's more well-known villains, famous for his half-scarred face, coin-flipping, and duality-obsessed psyche.
This chapter takes place in Washington Square Park, in Manhattan, New York. Dream is sitting in a dry fountain.
Mary Poppins is a Disney musical made in 1964, starring Julie Andrews and Dick Van Dyke, based on the book series by P.L. Travers.
The Romani are a European ethnic group, also known as gypsies, thought to originate in India.
Romani is also the name of their language.
This is a traditional Jewish prayer called the "Sh'ma Yisroel," "Shema Yisrael," or "Shema." It's translation is "Hear, O Israel, the Lord Our God, the Lord is One." It is traditionally said in every worship service and just before death.
Listen to the Shema at Beki.org.
Find more information about the Shema at the Jewish Encyclopedia.