Cerebellar tumour at operation

Four drawings in total, three of which show the cerebellum retracted at an operation to remove the tumour and the fourth of which shows a cross section of the cerebellum to demonstrate the position of the tumour before it was removed. The fourth image has the labels pons, 3rd ventricle, and line of tentorium. Annotations on the back read "Imaginary drawing of tumour as it lay in cerebellum - with nerves cut".