Karl Yessen

Karl Jessen appears in Freud’s account not as a character in a continuous narrative, but as a named authority whose examples help map the relation between waking life, forgotten memory, physical sensation, and dreams. His function is evidentiary: Freud draws on Jessen’s work to show that dream content may be tied to a dreamer’s circumstances and to stimuli the sleeping person does not consciously recognize.

Identity and Role

Jessen is cited in the survey of earlier writing that precedes Freud’s presentation of his own method. The book’s historical review establishes the intellectual setting for Freud’s argument, while Jessen’s examples give the review specific material: dreams can continue threads from waking experience, preserve knowledge unavailable to conscious recall, and incorporate sensations received during sleep.

Dreams and Waking Life

Freud uses Jessen to support the view that dreams are not necessarily a departure from ordinary life. In the account of earlier theories, Jessen writes that dream content is shaped by a person’s personality and circumstances, including age, sex, class, education, way of life, and the events and experiences of that person’s life. This places individual biography at the center of the explanation: the dream is not detached from the dreamer, but bears the imprint of the life already lived.

Forgotten Knowledge in Dreams

Jessen also supplies a case of dream knowledge that the waking dreamer could not consciously retrieve. The elder Scaliger dreamed of a man named Brugnolus, who complained that he had been forgotten. Scaliger could not remember having heard of him, yet composed verses about him; his son later learned in Verona that Brugnolus had indeed been known there as a critic. Freud includes the case among examples of dream-hypermnesia, in which a dream appears to recover knowledge that waking consciousness has lost or does not recognize as its own.

Bodily Sensations as Dream Material

In a further passage attributed to Jessen, physical sensations and external stimuli are linked to dream imagery. A rumble of thunder may become a battle, a cock’s crow a human cry, and a creaking door a scene of burglars entering. A sleeper who loses the bedclothes may dream of being naked or falling into water; feet projecting beyond the bed can be transformed into standing at an abyss or falling from a cliff. These examples show how a sensory disturbance can be translated into a scene rather than represented as the disturbance itself.

Jessen’s place in Freud’s argument is therefore practical as well as historical. His material gives concrete form to the claim that dreams draw on the dreamer’s life, memories, and bodily condition, while showing that the resulting images may disguise the sources from which they arise.