The literature has scant documentation of the relationship between the important founders of paediatric cardiology, Maude Abbott and Helen Taussig. Recently discovered entries in the diaries kept by Maude Abbott provide evidence for a close connection between them. Further evidence suggests that their association was complex, and influenced by outside factors, such as their difference in age and era-related notoriety. In this review, I attempt to define more clearly the relationship between these two early icons of paediatric cardiology.