Meanwhile, back in 1979...
OK, now, let's - I'll pick it up as if you were actually in a dungeon, and I'll relay to you, because I have to be your eyes and ears and everything, and you're going to tell me what kind of information you need. So we'll assume that you are in a four-way passageway underground and you can choose any direction you want to go. Ten foot wide stone corridors deep beneath the earth. Now, you have a choice of any of the four directions, you tell me where you go to.
OK, let's go to the left.
OK, you go to the left and we'll say you were going north, so you're going to head off to the west.
OK, you go west and I tell you how many feet, you've gone a hundred feet west - and suddenly there's a huge bronze door before you, with a big doorknocker on it, a big ring that obviously opens the door and serves as a knocker also. Do you want to turn around and go back the other way? Open the door? Knock first? What would you like to do?
I think I'll knock first.
OK. Now, without having all of this written down, of course, there could be, the - perhaps the knocker will trigger a stone block that drops on your head.
This morning in Angband...
Dain the Ranger finds himself at a 4-way intersection on lvl 6.
He moves west down the corridor.
He is confronted by a large sturdy door.
He opens it.