Walter’s habit of accidently dropping T’s eventually got him into trouble with the gang when he continuted to show up at the bank robberies armed only with a useless shogun.
This explains why Billygoat Gruff died under the bridge on the way to Walter’s house—he was looking for rolls under the bridge and wondering why he was supposed to be cautious.
If he thought they were rolls, I’m surprised Billygoat didn’t just eat them.