So then at some point the Bellevue had to make some changes, due to the fact that Lister theories about the antisepsis had been accepted in the world of medicine. In the Surgical Division an extremely rapid change in method took place, so that the antiseptic surgery had changed the whole appearance of wards in the hospital. Morris was one of the main supporter of the new method enounced by Lister, and later on, of the new theories about asepsis, introduced by Dr. Ernst von Bergmann in 1892.