Then there’s the other way, a la Sir Laurence Olivier, though it sounds like in having a “Bible” for the character, maybe Brett was still part of that workaday British tradition.
Dustin Hoffman has long been known as one of method acting’s most earnest exponents. A showbiz story involves his collaboration with Laurence Olivier on the 1976 film Marathon Man. Upon being asked by his co-star how a previous scene had gone, one in which Hoffmann’s character had supposedly stayed up for three days, Hoffmann admitted that he too had not slept for 72 hours to achieve emotional verisimilitude. “My dear boy,” replied Olivier smoothly, “why don’t you just try acting?” (Hoffman subsequently attributed his insomnia to excessive partying rather than artistry).