The notebook contains observations made by De la Caille at the Cape and elsewhere; a list of expenses in connection with his observatory at St. Martin (Paris); and details of the mathematical basis for his calculations, including lists of formulae and trigonometrical proofs, used as an aide-memoire during his travels. There are calculations of some star coordinates, apparently made at the Cape, and, most important of all, a calculation of the difference in latitude between the Cape and Klipfontein for his determination of an arc of the meridian.
There are minutes, directors reports, notices to shareholders, balance-sheets and accounts, correspondence, memoranda, plans and annual publications relating to the Boshoff Group. In addition there are records pertaining to various mines and investment companies.
The collection contains the typescript for "African tragedy: the life story of a native doctor", written by the Psycho-analyst Wulf Sachs.
There is no date on the typescript, it was received in 1944, and has 'Draft' written on its spine. The content is similar to "Black Anger" by W. Sachs, published in 1947, as it deals with the same character 'John'. But whereas "African tragedy" is told in the first person, "Black Anger", although including identical incidents, is written by Wulf Sachs as told to him by 'John'.
This section will contain various publication formats for which Afrapix photographs were used. The cover image depicts the fold-out brochure produced by Afrapix, Co-ordinator Diane Stuart.
