The Four-Chambered Heart, Ana�s Nin's 1950 novel, recounts the real-life affair she conducted with caf� guitarist Gonzalo Mor� in 1936. Nin and Mor� rented a house-boat on the Seine, and under the pervading influence of the boat's watchman and Mor�'s wife Helba, developed a relationship. Mor� named the boat Nanankepichu, meaning "not really a home."

In the novel, which Nin drew from her experiences on the boat, the characters are clearly based. Djuna is an embodiment of Nin herself. A young dancer in search of fulfillment, she encapsulates all that the author was striving for at that time. The character of Djuna features in other novels, perhaps weaving a directly autobiographical thread into Nin's fiction. The gypsy musician, Rango, is therefore Mor�, and his invalid wife is Zora. The old watchman is present as a force which, along with Zora, works against the lovers in their quest for happiness.

Nin's main concern is the "outside," and how it affects the "interior." Water is a cleverly used theme. "I have no great fear of depths," says Djuna, "and a great fear of shallow living." Rango and Djuna's relationship is, in effect, their effort to remain afloat. Often, Nin employs a stream of consciousness, especially in her flowing analyses of love, life and music, which continues the water image.

Ana�s Nin's writing is typically exquisite in its detail and texture. She describes Paris: its "black lacquered cobblestones" and "silver filigree trees." The "humid scarfs of fog" on the river, and "the sharp incense of roasted chestnuts" reveal their source through their reality: Nin's personal experience.