After Martinus retired, he moved with Henriëtte and Johanna to their summer home in Gorssel (above, in a painting by Henriëtte). Johanna died soon after. Martinus carried on with microbiological research and the archives include a collection of letters between him and Kluyver discussing his results. After his death, Henriëtte returned many of his books and papers to Delft, and these form the core of the collection.


© 2017 TU Delft