Copy letter from [Robert William Frederick Harrison, Assistant Secretary of the Royal Society]; to Professor Walter M. Gardiner; City Technical College, Bradford Reply to an earlier letter from Walter M. Gardiner. Explains that if Mr. Middleton has already attested then the enclosed letter of instructions will apply to his case [not enclosed]. If Mr. Middleton has not attested then Mr. Gardiner must obtain a certificate of recommendation for his exemption from the Society, for which the Society will need to see a full statement of his chemical qualifications. 1 March 1916