When Hoss first goes up to Arnie's cabin, there is a fold visible in the "sky" behind Arnie.
When the posse is gathering up outside the Sheriff's to go after Arnie, Hoss asks Ben for a headstart to speak with Arnie. He tells them he thinks Arnie is at Granite Point. After Hoss leaves, the Sheriff questions Ben about Hoss's intentions - once Ben convinces the Sheriff that Hoss is not trying to help Arnie get away, the Sheriff asks Ben to show them where Granite Point is. This is a mistake as Ben hadn't told the Sheriff yet that Hoss was going to Granite Point.