Used by the routines at TOO_DARK, FIND_NAMED_OBJECT, LIST_HELD and DO_CLIMB_INTO.

The actor from ACTOR, then IN_REACH_OF. Called directly with the player at Bag End, it says yes to the wooden chest, the map the player holds, Gandalf, Thorin, and the round green door -- which is in Bag End and the Lonelands at once -- and no to the large key the troll is holding in the clearing, the heavy rock door, and the short strong sword, which is lying in the trolls' cave, where Bilbo finds Sting in the book.