Two ross drawings mounted one above the other. The top one shows an operation for a cystic cerebellar tumour and the bottom one is of a section of the removed specimen. Attached to the back of the object is a piece of paper containing three rough pencil sketches with numerous labels and the description "looking up into aqueduct leading to 3rd vent." Other annotations on the back read "Jefferson, patient's name age 14. 18.5.56? 56.10.09.12".
Signed by the artist at the bottom in the middle.