In this splendid report of the psychoanalysis of a stammering girl, the author sees the stammer as a 'dysfunction of the preconscious; the dysfunction of molding affects into words'. From the numerous overdeterminations described, this monosymptom was for the girl a conversionlike symptom, derived from all levels of psychosexual development and with somatic and psychic equivalents. The stammer was cured and, several years after treatment was concluded, the patient became an interpreter in five languages.