Mark
CreativeMountainGames.com
In the play example in the 1e DMG, there is no caller, but there is a leader, who acts much like a caller. He makes all the minor decisions - movement and searching. The other players get to speak quite a bit though. Another player seems to take the lead in the water room with the blind fish, where the leader is quite disinterested at first, and then a different player, the gnome character's, takes more of a lead in the room with the secret door.
I'm familiar.

