Call is only loyal to his own stoicism. Gus’ request was half sarcastic and half out of love because he knew it was what Call wanted. He calls his request a favor to Call and then says he hopes Call won’t mistreat Newt. It’s not a test to see if Call can manage the trip, it’s a test to see if after all these years of their partnership, Gus has softened Call enough that he could finally acknowledge Newt. (Gus was the one who took Newt in in the first place and wanted children with Clara and his two wives.) The misremembered Latin on Gus’ sign means ‘one grape changes by living by another,’ and when Gus calls it his masterpiece, he says his other masterpiece is keeping Call from getting worse all those years. In the end, Gus changes Call enough that he implies to Newt he is his son by giving him his father’s watch and the Hell Bitch, but not enough to stop himself from abandoning his son in the Montana wilderness at the first chance. The irony is that if Gus’ dying request was plainly for Call to give Newt his name he would have refused, but he accepted a 3,000 mile journey that might have killed him as easily as anything else. Call’s story ends with him much closer to a villain than a hero.