Dr Sydney Archer, Research Professor of Medical Chemistry, Rensselaer Polytechnic Institute, New York Correspondence regarding Dr Archer's and Kosterlitz's research and work, particularly the sending of scientific samples for experiments and the exchanging of copies of their scientific papers. Correspondence talks about Kosterlitz and Hanna's visits to Archer and Teddy and Archer's visits to the UK. Also talks about Kosterlitz's other travelling and visiting, including his visits to the USA, and visit in 1974 to the Max - Planck Institute for Psychiatry, Munich. Correspondence mentions the Gordon Conferences and annual & biannual meetings of the INRC, for example the letter from Archer dated 15 October 1976. Letters, dated 18 June 1975 from Archer and 26 June 1975 from Kosterlitz, saying that NATO [North Atlantic Treaty Organisation] might be a potential source of travel funds 'for Aberdeen'. Correspondence includes an article from the 'Times - Union' newspaper, dated 15 November 1975, entitled 'Researchers find new painkiller', which says that 'researchers at Johns Hopkins University have discovered a naturally - occurring, opiate - like substance [called 'Endorphin'] in human and other animal brains'. Includes a letter, dated 12 December 1980, from Archer to Dr Leo Hollister, Executive Secretary, The Committee on Problems of Drug Dependence, Inc., Veterans Administration Hospital, Palo Alto, California, nominating Raymond D. Houde 'to be the next recipient of the Nathan Eddy Award'. Includes letter, dated 22 July 1986, from Archer, enclosing an annotated copy of Louis S. Harris' Nathan B. Eddy Memorial Award Lecture. There are gaps in the correspondence: in 1977, 1978, 1980, between 1981 and 1982 and in 1982. There is no correspondence for 1983. Also gaps between 1984 and 1985, between 1985 and 1986, and there is only one letter dating from 1986. The second file contains research notes relating to Archer's work, such as a transcript copy of his talk he made in 1979 in Cocoyoc, entitled 'A Model of an Opiate Receptor', and a transcript of: Sydney Archer, 'A Model for the Analgesic Receptor'. 1973 - 1986