How was a later version of Touch of Evil reconstructed using Orson Welles’s memo?

After Orson Welles delivered a rough cut of Touch of Evil to Universal, the studio edited the film against his wishes, adding footage and cutting the runtime to 93 minutes. In response, Welles wrote an extensive memo detailing his preferred edits and how the film should be cut, though his requests were ignored at the time.12

In 1998, more than a decade after Welles’s death, Universal released a 111-minute version of the film that was reconstructed based on the instructions found in his original memo. This restoration process was notably aided by the discovery of Welles's notes by actor Charlton Heston, who had starred in the film.12