 The years of rest without streptomycin delayed his career and during this time he read Thomas Mann's novel "Magic Mountain" about the experience of patients in a tuberculosis sanitarium.The work affected him greatly and he never failed to recommend the work to medical students on his service.He was first professor at Boston University School of Medicine, then Frank Wister Thomas professor of medicine and chair of the department of medicine at the University of Pennsylvania School of Medicine (now the Perelman School of Medicine), and finally a professor at Harvard School of Medicine.