Preface to Volume 27, 2 B

The present volume contains the critical commentaries for the works published in Volume 27 of Series A and Volume 27, 1 of Series B. In addition, all the known sketches for these works are reproduced and annotated. Difficulties arising in the course of research into the sources in libraries in the United States and in the archives of the original American publishers have caused considerable delay in the publication of this volume. I trust that the reader will show forbearance.

The editor is grateful to Professor Richard Hoffmann (Oberlin/Ohio), Professor Dr. Jürgen Thym (Rochester/ N.Y.) and Dr. Ivan Vojtĕch (Prag) for their considerable help in the preparation of this volume.

Berlin, June 1986
Nikos Kokkinis