"The MSS. which formed the basis of this book were committed to us by the author ... It was his wish that we should construct upon them a much more complete treatise than we have effected ... Part I [has been printed] almost exactly as it came from his hands ... Part II has been written from a hurried sketch ... Chapter XI of this part [and Appendix E have] been entirely re-written by us ... Appendix H, and all the exercises have ... been written solely by us." From the Preface signed: Alicia Boole, H. John Falk.