Large binder labelled 'J. Walker Bacilysin. Production expts. Early purification expts' on the spine. Separated into sections by dividers labelled as follows: 'Protease (February, March 1967) 'NMR' (September 1968-March 1969) 'Bacilysin hydrolysis' (October, November 1968) 'Mass spectra' (May-November 1968) 'Crystallization' (September,...