9 September 1839 (+) is born in Leiden, Netherlands.

25 May 1866 (-) poisoned with arsenic Catharina Swanenburg in Leiden, Netherlands.

25 May 1866 (-) poisoned with arsenic Johanna Swanenburg in Leiden, Netherlands.

12 May 1870 (-) poisoned with arsenic Johannes Swanenburg in Leiden, Netherlands.

4 December 1871 (-) poisoned with arsenic Pieternella Swanenburg in Leiden, Netherlands.

14 November 1877 (-) poisoned with arsenic Clement Swanenburg in Leiden, Netherlands.

30 May 1881 (-) poisoned with arsenic Cornelia De Hees-Van Der Linden in Leiden, Netherlands.

15 July 1881 (-) poisoned Willem De Hees in Leiden, Netherlands.

3 November 1881 (-) poisoned with arsenic Arend De Hees in Leiden, Netherlands.

22 November 1883 (-) poisoned with arsenic Catharina Aben in Leiden, Netherlands.

12 December 1883 (-) poisoned with arsenic Mien Frankenhuizen-Van Der Linden in Leiden, Netherlands.

19 December 1883 (-) poisoned Hendrik Frankhuizen in Leiden, Netherlands.

23 April 1885 (x) Start of the trial against Swanenburg in Leiden, Netherlands.

11 April 1915 (-) dies of unknown causes in Gorinchem, Netherlands.