General Problems of Interpretation. An Authentic Eighteenth-Century Performance Source: C. F. Colt's Organ-Barrels. Studies in Rhythm. In Search of the Correct Bach Tempo. Bach's Articulation. Dynamics. Problems of Sonority. Problems of Harpsichord and Piano Technique, and of Expressive Playing. The Urtext Problem: An Imaginary Interview. Rendering the Structure as a Whole. Prelude in E flat minor and Fugue in D sharp minor, WTC I, BWV 853. An Analysis for Performance -- Studies in Ornamentation. Introduction. The Development of Ornamentation in the Seventeenth and Eighteenth Centuries. J. S. Bach's Ornaments: Some General Remarks. Pralltriller. Appoggiaturas. The Longer Trill. Bach's Mordent. Arpeggios. The Application of Ornaments that are not Notated. Free Embellishments in Bach's Keyboard Works. Appendix 1. Some Recommended Editions of Bach's Keyboard Works -- Appendix 2. Some Textual and Interpretational Problems in Bach's Chromatic Fantasia and Fugue, BWV 903 -- Appendix 3. J. M. Gesner, 'Johann Sebastian Bach as Conductor, Keyboard Player, and Organist' (Gottingen, 1738) -- Appendix 4. Excerpt from the Article 'Takt' in J. G. Sulzer's Allgemeine Theorie der schonen Kunste, vol. ii (Leipzig, 1774) -- Appendix 5. The Dedication of Partita No. 1 (BWV 825) and the Dedicatory Poem --