Highbough ponders for a moment. "The wisest course of action would be to avoid raising the alarm at all costs and find a way to rejoin the others. I am willing to sacrifice my silver dagger, if necessary, to get home."
Sorry to make my character appear indecisive. Based on meta-game knowledge of what the other players have decided, I think we need to abort. If we even can. For all we know, the journey was one-way, as Highbough originally assumed.
Everybody check your equipment lists for shiny things like: helms, shields, blades, coins, mirrors (!), bowls/plates, jewelry, etc.
Also... do we know Gustave is here, or are we just assuming?