I think a point's being missed here.

While I agree with Bob in always approaching a negative fresh these prints maps are important as teaching/learning aids purely as they are the only way to show how a photographer/printer has reached the final print.

I've seen John Blakemore printing some of his better known images and he goes in fresh so over time the interpretations change, but a sketch mapping how a print is dodged and burned is the only way to put things across in publications.

Ian