Drawings includes both scientific drawings of a high quality. The numerous drawings, especially of parasitological subjects, are by Professor G.H.F. Nuttall, Keilin and perhaps others. Professor G.H.F. Nuttall was Keilin's predecessor as Quick Professor of Biology and Director of the Molteno Institute, Cambridge University. There may also be drawings related to the experiments of Sir Ronald Ross. The high quality of the execution has been thought justification for retaining drawings.