Ross drawing of axial section of the brain. Annotations on the back read "Department of medical art. Photographed also, index no. 571119002". There is also a fairly detailed typed description of the specimen on the back.
Zita Stead provided illustrations for a great number of publications and is known to have been active between 1940s-1960s. She appears to have been based in London.
Signed by the artist, bottom right.