Two notebooks sent by Parrish to Kendrew at his request for the present collection. In an accompanying note of October 1986 Parrish writes: "although the imidazole derivative crystallization experiments are covered in the present books, the resultant effect on isomorphous intensity changes is not mentioned." Also covered are various efforts toward insertion of iodine and other heavy atoms, none successful. Anyway, the period covered is Sept. 1952 to May 1954 during which time we did the species survey, identified the sperm whale crystals as preferred, showed that isomorphous derivatization (even without heavy atoms) could produce significant intensity changes and began the program to get heavy atoms into the structure.

Parrish published a collaborative paper with Kendrew and others on "Species specificity of myoglobin", Nature, 174, 1954, and a paper with Kendrew on "Imidazole complexes of myoglobin and the position of the haem group", Nature, 175, 1955.