These documents were housed in a small sub-folder within the larger folder. The correspondence includes a letter from von Bertele setting out arrangements for a visit by Joseph Needham and Dorothy Needham to Vienna, 30 January, 1963; copy of a letter from Joseph Needham advising von Bertele that he will be invited to lecture at the History of Science Unit in Cambridge and of the difficulty in obtaining a price for a 'Catalogue of Collection of Old Scientific Instruments (1479-1800) of Ant. W. M. Mensing', 10 April 1963; notes and letters resulting from Joseph Needham's enquiries to discover the price of the Mensing catalogue; advertising leaflets for von Bertele's book, 'Globes and Spheres', (Lausanne, 1961) and 'Uhren' by J. von Bassermann-Jordan, (Braunschweig, 1960); letter from G. Buchdahl of the Department of History and Philosophy of Science, Cambridge confirming von Bertele's visit and suggesting various lecture topics, 24 July 1963; copy of letter from Joseph Needham to von Bertele confirming the exchange of the Mensing catalogue with two volumes of 'Science and Civilisation in China', 13 August 1963.