Ross drawing of the tumour in situ with the following labels: tumour in Cavernous and Cavum Meckelii, optic nerve, carotid artery, 3rd nerve, 4th nerve, and 5th nerve. Annotations on the back read "Mr Jefferson. Dr Susman's specimen, see Extrasellar Extension of Pit Adenoma p17" and "Proc. R.S. of Med 18.1.40".
The drawing features as figure 10 in the publication G. Jefferson, 'Extrasellar extensions of pituitary adenomas. President's address', Proceedings of the Royal Society of Medicine, 1940, vol.33, pp.433-58, in which the following description is given: "Malignant adenoma invading cavernous sinus and surrounding carotid artery. Compression left third nerve".
Signed by the artist in the bottom right corner.