Caul's Letter on Treating Multiple Personality

Caul's Letter on Treating Multiple Personality is a statement of the professional standards and therapeutic principles that Dr. David Caul considered necessary for treating a patient diagnosed with multiple personality. Written to Alan Goldsberry and read into the record through Caul’s deposition, it gave the court a detailed account of what responsible treatment required. Its decisive claim was that the standards were not an idealized maximum: they were a minimum threshold, below which treatment should not be attempted.

Document and occasion

The letter entered the courtroom through a deposition of Dr. Caul’s testimony taken three days before the hearing. Before the hearing went into its luncheon recess, Goldsberry introduced the deposition into evidence, intending to put Caul’s testimony on the record before calling other witnesses. Steve Thompson had questioned Caul about the essential requirements of a treatment program for a person diagnosed with multiple personality. Caul answered from notes that included the letter he had sent to Goldsberry on November 19.

The circumstances made the document more than a general statement about psychiatry. The hearing concerned Milligan’s treatment and placement, and the court was hearing from people directly involved in his care. In this setting, the letter put a professional framework into the record: it described the expertise, preparation, commitment, and therapeutic approach that Caul believed the diagnosis demanded. It also let the court examine a concrete standard of care rather than treating the diagnosis alone as a sufficient account of what treatment should involve.

Professional requirements

Caul’s first requirement was that treatment be undertaken by a mental-health professional, preferably a psychiatrist, who accepted the condition. In his account, disbelief in the phenomenon was disqualifying: a clinician could not responsibly treat a condition that the clinician refused to recognize. The letter thus made acceptance an active prerequisite, not a matter of courtesy or a belief that could be postponed until after treatment began.

Caul also addressed the limits of experience. A psychiatrist who lacked experience could undertake treatment only if willing to accept the condition and work under supervision, or at least maintain ongoing consultation with a colleague who had relevant expertise. The provision linked the clinician’s openness to the need for professional accountability: willingness alone did not replace experience, and inexperience required continuing guidance.

The further standards named in the testimony combined preparation with endurance. The clinician should have read significant literature on the subject and attended some form of continuing education. Caul also emphasized almost infinite patience, tolerance, and perseverance, because treatment would be long, laborious, and difficult. Together, these requirements describe a sustained commitment rather than a brief evaluation or a technical intervention carried out without specialized knowledge. The letter presents the treating professional’s readiness as part of the treatment conditions themselves.

Principles of therapy

Caul’s general principles begin with recognition and inquiry. All the personalities must be identified and recognized, and the therapist must determine why they exist. The sequence matters: treatment cannot proceed responsibly by ignoring the personalities or treating their presence as irrelevant. It must first establish who is involved and investigate the function or circumstances behind the condition.

The therapeutic task, as Caul described it, was not simply to suppress conflict. The therapist should identify positive qualities and try to bring about some form of compromise among the alter personalities, with particular attention to those that could threaten the patient or other people. This approach joins recognition to practical risk management: each personality is to be understood, while dangerous conflicts call for efforts toward accommodation.

Caul also insisted that the patient become fully aware of the nature and extent of the problems and participate in resolving them. The patient was not to remain a passive recipient of therapy; understanding the treatment process and contributing to a positive resolution were part of the work. The principle makes informed participation central to the method, rather than treating cooperation as incidental to a clinician’s plan.

The letter specifically cautioned against antipsychotic medication, which Caul said could produce fragmentation and other side effects detrimental to treatment. He presented this as one principle among several issues, not as a complete account of how to treat such cases. That qualification is important: the document sets out a framework and minimum conditions while acknowledging that its list does not exhaust the complexity of the work.

Courtroom force and significance

During cross-examination, David Belinky suggested that Caul had described the requirements as optimal. Caul rejected that characterization and stated that they were minimal; he added that such conditions should be the starting point and that otherwise a person should be left alone rather than treated. The correction sharpened the letter’s practical force. It was not merely a portrait of ideal care but a threshold against which treatment arrangements could be judged.

Dr. George Harding Jr. later called Caul’s statement excellent and agreed that the conditions it set out were minimum requirements. Harding also testified that he still considered Athens the proper place for Billy’s treatment. His support gave Caul’s letter weight beyond Caul’s own testimony: another physician involved in the case endorsed its standards while addressing where treatment should continue.

The letter’s principles also illuminate the difference between a treatment setting and a secure placement. After Milligan was moved to the Dayton Forensic Center, he hoped a later hearing would lead to his return to Athens, where he believed Dr. Caul could treat him, bring the personalities together again, and restore the Teacher. The book reports that, at Dayton, he read, wrote, and sketched but was not allowed to paint, and that his communication with the other personalities deteriorated. Those later circumstances do not themselves prove what the letter could have changed; they do show why its insistence on specialized, sustained treatment mattered in the larger dispute over Milligan’s care.

As a courtroom document, Caul’s letter translated a clinical position into standards that could be assessed by witnesses and the court. Its connected demands—acceptance of the diagnosis, appropriate expertise or consultation, continuing study, patience, recognition of all personalities, attention to their reasons and strengths, patient participation, and caution about medication—define treatment as a disciplined relationship rather than a single procedure. Its most consequential distinction is between treatment that merely claims to address the diagnosis and treatment undertaken under conditions Caul regarded as the minimum necessary.