[quote=@Lugubrious]
Because of this, even if Henry could have heard or witnessed the arrival and ominous discussion of the five Big Sisters atop their raft of ice in the lake, he did not.[/quote]

I should note that the Big Sisters teleported to shore before they began talking. Not a huge thing, just so everyone knows they on shore now maybe fifty meters from the shack except for Five who is in front of the shack watching it burn.