When Buck picks up the paper that Ike had thrown aside, the paper is crumpled into a wad and is very wrinkled. In the next view, when he opens it to look at it, it is almost completely smooth except for a few folds.
Metcalf introduces himself to Ike after Ike saves him, which implies that the two had not met before. When they return to the house, Metcalf says, "Thanks for your help with Neville, Ike." However, there would have been no way for him to know Ike's name, as Ike could not tell him himself, and there was no one else around to tell him.