“Nog een zuster van Jeroen Bosch” (F.W. Smulders) 1957
[in: De Brabantse Leeuw, 6 (1957), pp. 70-72]
[Also mentioned in Gibson 1983: 29-30 (B17)]
Smulders refers to a number of archival sources from the Bosch Protocol regarding Bosch and his family. From these we learn that Bosch had a second sister (Katherijn) and that his wife’s great-grandfather was a chemist.