Copy letter from William Bate Hardy, Secretary of the Royal Society; to the Under Secrertary of State, Foreign Office Asks on behalf of Mr. Balfour Brown, Entomology lecturer of the University of Cambridge, to ensure Brown's luggage are labelled 'scientific equipment' to ease the progress through Customs at Rio de Janeiro. This is in preparation for a small exepdition to Brazil to collect Mammalia for the British Museum. 30 May 1923