Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to the Secretary of the Royal Aeronautical Society; 7 Albermarle Street, W.1. In reply to the Secretary's letter, informs him that the Royal Society acts in an advisory capacity to the Customs authorities with regard to importing films free of duty [if they are proven to be purely scientific]. Encloses a notice from the customs commissioners, and informs the Secretary that all questions and applications should be sent to Custom House. [Enclosure not present.] 11 December 1929