Letters to Robert Robinson, surnames beginning Ma - Me Correspondence with the following: Richard Henri Martin, concerning Voachalotine, with a series of chemical formulas provided as proofs (1962); Marcus A Matthews, concerning the manufacture and supply of extraction solvents with particular reference to Burmah-Shell's operations in India (1961); Peter Brian Medawar, addressed to Lady Robinson, reporting on the testing of a sample (1946); Incomplete letter L J Meduna [pages 4-5 only], concerning investigations into possible treatments for schizophrenic patients (1957). 1946-1962