I have perused those archives many times, more important than the book (of which I have a translated hardback copy), are the notes which include the hand writte

I have perused those archives many times, more important than the book (of which I have a translated hardback copy), are the notes which include the hand written (and commented) assembly for every draft of the compiler. The hard part is that its not the same as the final version so you have to interpolate the changes.