If Elaine Morse is still around she could perhaps shed some light. Perhaps Tufte knows her. (Many years ago I went to a talk by Dennis Ritchie about *roff. H

If Elaine Morse is still around she could perhaps shed some light. Perhaps Tufte knows her. (Many years ago I went to a talk by Dennis Ritchie about *roff. He showed the graphic and said that someone at Bell Labs had taken the time to code it up. I have no idea if that person is Ms Morse, though.)