Heading up the westernmost north passage you travel along for about 18 meters before coming to a right-hand turn. Interestingly enough, following that passage a short distance (again about 18 meters) brings you to a turn southward, quite possibly heading back to the room with the beetles. You need not continue south however, for in front of you (east) is another great doorway.
[sblock=OOC]A marching order is not necessarily required since many first round actions will be spent arranging battle lines. AD&D is not a tactically complex system when it comes to movement and position. I will presume the fighters take point while the casters bring up the rear unless you want to spell out something more detailed. It might be important in the event someone triggers a trap, but unless a trap targets a single individual it is likely to affect several of you anyway, in which case those in front may get a saving throw of some kind.[/sblock]