This project would not have been possible without the help and support of the British Academy, whose research grant in 1989 enabled me to make the first of my research trips to examine manuscripts and printed editions; of my colleagues at the three institutions at which I've worked, Goldsmiths' College, the Britten-Pears Library and the Royal College of Music, from whom I learned a great deal; of many friends in the International Association of Music Librarians; and of many colleagues around the world, and in particular:

Thomas Aigner (Musiksammlung, Wienbibliothek)

Professor Ian Bent

Dr Otto Biba (Gesellschaft der Musikfreunde, Wien)

Ao.Univ.Prof.i.R. Dr. Max Bichler (Wien)

Michael Bosworth

Elisabeth Briefer (Abteilung Wissenschaftliche Information, Österreichische Nationalbibliothek)

Dr Avior Byron (Tel Aviv)

Daniel Dorff (Theodore Presser Company)

Dr. Gila Flam (Music and Sound Archives, The Jewish National and University Library)

Angelika Glatz (Universal Edition)

Ray Heigemeir (Stanford University Libraries)

Rik Henriks (Nederlands Muziek Instituut)

D.J. Hoeck (Northwestern University)

Dr Kathryn James (Beinecke Rare Book and Manuscript Library, Yale University)

Katja Kaiser (Universal Edition)

Gilbert Kaplan (†New York)

Professor Rainer Kleinertz (University of Saarland)

Professor Christian Kluttig (Dresden)

Margit Klutsch (Tonhalle-Orchester, Zürich)

Dr Bob Kosovsky (The New York Public Library for the Performing Arts)

Ronald Kornfeil (Universal Edition)

Dr Reinhold Kubik (Internationale Gustav Mahler Gesellschaft)

Arndt Joosten (Philharmonie, Baden-Baden)

Henry-Louis de La Grange(†Paris)

Dr Thomas Leibnitz (Musiksammlung, Oesterreichische Nationalbibliothek)

Robert Lipartito (Library of Congress, Washington)

Knud Martner (Copenhagen)

Jerry McBride (Music Library & Archive of Recorded Sound, Stanford University)

Dr Simon McGuire (Sotheby's, London)

Dr Donald Mitchell (†London)

Paul van Nieuwkerk (Den Haag)

Kapellmeister Reinhold Nowotny (Vienna)

Mdme Alena Parthonnaud (Médiathèque Musicale Mahler)

Professor Robert Pascall (†Bangor University)

Lisa Philpott (Music Library, University of Western Ontario)

Dr Alice Prohaska

Pablo Sanchez-Quinteiro (Spanish Mahler Society)

Professor Edward Reilly (†Vassar College)

Dr Rupert Ridgewell (British Library)

Karen Robson (Hartley Library, University of Southampton)

Dagmar Rumpf (Stadtmuseum und Archiv, Baden-Baden)

Natalia Sciarini (Beinecke Access Services)

Philip Shields (Royal Irish Academy of Music)

Martin Sima (Doblinger Verlag)

Nigel Simeone

Jasmine Simeone

Dr Renate Stark-Voit (Vienna)

Heinz Stolba (Universal Edition)

Erwin Strouhal (Universität für Musik und darstellende Kunst, Wien)

Robert Threlfall (†London)

Rigby Turner (formerly Pierpont Morgan Library)

Professor John Tyrrell (†University of Nottingham)

Frank Villella (Rosenthal Archives of the Chicago Symphony Orchestra)

Meike Wilfing-Albrecht (Vienna)

Emily Worthington (Huddersfield)

Timothy Young (Beinecke Rare Book and Manuscript Library, Yale University)

Dr Frits Zwart (Nederlands Muziek Instituut)

And last, but certainly not least, Chris Banks (Director of Library Services, Imperial College, London), my companion and support on most of this long research project, without whom it would certainly have been less fun.

Acknowledgments