Ross drawing of a coronal section of the patient's brain. Annotations on the back read "Jefferson MRI patient's name 15 years old pineal tumour op. 1938". See also VFA.7.261 for another drawing relating to this patient.
This image features as figure 5 in the publication E.W. Twining, 'Radiology of the third and fourth ventricles, part II', British Journal of Radiology, 1939.