Alle de Brieven. The Collected Letters. Volume 5
Letters 82 [43] – 89 [48] written between 1685 and 1686. Editor, A. Schierbeek
The links below take you to the text of the letter in the original Dutch and in English translation from Alle de Brieven. The Collected Letters at the DBNL - De Digitale Bibliotheek voor de Nederlandse Letteren (Digital Library for Dutch Letters).
Cole's number, usually the same as Leeuwenhoek's, is in brackets. These are the numbers used by Dobell, who wrote before the Committee of Dutch Scientists began collecting and numbering all of the letters.
Letter 82 [43] of 5 January 1685
Letter 83 [44] of 23 January 1685
Letter 84 [45] of 30 March 1685
Letter 85 [46] of 13 July 1685
Letter 86 of 10 August
Letter 87 of 21 September 1685
Letter 88 [47] of 12 October 1685
Letter 89 [48] of 22 January 1686