Large ross drawing of coronal section of the brain. Annotations on the back read "MRI Jefferson patient's name glioma".
This image features as figure 24 in the publication G. Jefferson & H. Jackson, 'Tumours of the lateral and of the 3rd ventricles', Proceedings of the Royal Society of Medicine, 1939, 32, pp.1105-37, in which it is described as follows: "Intraventricular tuberose sclerosis with embryonal type of glioma in 3rd ventricle".
Signed by the artist in the bottom right corner.