He was his parents fourth child and seemed so much cleverer and more intelligent than the other children. However, he died from meningitis on 18 June 1866, aged twenty-one months. His mother's grief and despair were intense as his father, leading the Prussian army into battle against Austria, had taken away all the available doctors this making it impossible for her to alleviate the suffering of her child or to prevent his death, the memory of which would haunt her for the 
rest of her life. 
 

Source: Leo van de Pas