Foreword / Alexander Silbiger -- The development of the organ keyboard / Kimberly Marshall -- Lost worlds : the English organ before 1700 / Dominic Gwynn -- Writing a history of Mexico's early organs : a seventeenth-century disposition from the Mexico City Cathedral / Edward Pepe -- A meeting of two temperaments : Arp Schnitger and Andreas Werckmeister / Ibo Ortgies -- "Requisites for a perfect and durable organ" : examinations of Silbermann organs using Werckmeister's Orgel-Probe / Lynn Edwards Butler -- Women at the organ : a fragment / David Yearsley -- Bach, Heinitz, Specken, and the early Bundfrei clavichord / Richard Troeger -- Why we know so little about Bach's early works : a case study of two keyboard fugues / David Schulenberg -- A question of genre : J.S. Bach and the "mixed style" / David Ledbetter -- The origins of J.S. Bach's Wie jammern mich doch die verkehrten Herzen, BWV 170/3 / Gregory Butler -- Life and death in a fugue of Bach / Raymond Monelle -- Like father, like son? : Emanuel Bach and the writing of biography / Mary Oleskiewicz -- Josiah Leavitt : physician, entrepreneur, and organbuilder / Barbara Owen -- John Challis and Bach's Chaconne in D minor / Larry Palmer -- A method of designing a harpsichord string plan / Thomas Donahue -- The music of J.S. Bach : excerpts from the writings of Peter Williams -- Afterword / Peter Williams.