This image features as figure 4 in the publication G. Jefferson & J. Schorstein, 'Injuries of the trigeminal nerve, its ganglion and its division', British Journal of Surgery, 1955, in which it is described as follows: "Case 10. Bullet traversing back of left orbit to right malar. Section of both maxillary divisions. Palatal anaesthesia".
Initialled by the artist, "I W", bottom right.