Four pages of hand drawn brian diagrams. Each section of the brain is labelled with a number which correspondes to a chart. The last page consists of statistics and results. All referenced from Clark Le Gros, Sir Wilfrid E, Coopers, D M, Zuckerman, S, 1936, "The Endocranial Cast of the Chimpanzee", Journal of the Royal Anthropological Institute of London and Ireland, Vol. lxvi; Pg. 249-268.