Copy letter from Henry Hallett Dale, Secretary of the Royal Society; to the Secretary of Custom House; Lower Thames Street, E.C.3. Informs Custom House that the Royal Society has considered the cinematograph film that Sir Arnold Wilson wishes to import, and is of the opinion that it fulfils the conditions set out in section 8 of the Finance Act 1928 [exemption of solely scientific films from customs duty, provided the Royal Society certifies them]. 24 May 1930