Based on the dream of an hysteric, an analysand of Freud's, called 'The dream of the beautiful butcher's wife', we will see that unconscious desire is the motor of the dream and that this makes the dream the royal road to the Freudian unconscious. But we shall see that it was Lacan who was to provide the logic and the solution to what Freud encountered as the limit to this path of the interpretation of desire, which he called "the navel of the dream". Lacan will show that this navel is structural because "desire, in its unconscious function, is the desire of the Other". Finally, we will see how he turned hysteria into a discourse, a model of the social bond through speech which he will call discourse. [ABSTRACT FROM AUTHOR]