From the introduction: "The co-operation of the “nroff” program must also be mentioned. Without it, these notes could never have been produced in this form. How

From the introduction: "The co-operation of the “nroff” program must also be mentioned. Without it, these notes could never have been produced in this form. However it has yielded some of its more enigmatic secrets so reluctantly, that the author’s gratitude is indeed mixed. Certainly “nroff” itself must provide a fertile field for future practitioners of the program documenter’s art." Had he waited another year, he would have had access to TeX...