Chapter 1 Introductory; Chapter 2 Life of Erwin Nyiregyházi; Chapter 3 On the Early Appearance of Musical Talent in General; Chapter 4 On the General Aspect of Musical Talent; Chapter 5 Diagnosis of Erwin’s Mental Capacity by the aid of Tests; Chapter 6 Investigation of Elementary Acoustic and Musical Faculties; Chapter 7 Transposing, Reading at Sight, Playing from the Score, Musical Transcription; Chapter 8 Erwin’s Musical Memory; Chapter 9 Erwin as a Pianist; Chapter 10 Improvizing and Modulating; Chapter 11 Compositions; Chapter 12 Progress of Erwin’s Creative Musical Development as shown in his Works;