[The outside help in question stumbles onto the scene, an elderly gentleman, but spry enough. River lights up and waves him over.]

Over here!

[He points rapidly to the binder, but at the man's look of confusion, River realizes-]

Damn, he can't hear us. Ah, not a problem though.

[The water won't stop filling up, but he manages to point at the directions for the symbols, release code, and the location of their pin pad.]

I know I'm making you do a lot buddy, but the telepathy's our best chance outta here. Think you can dictate this to him in his head?