“…the adventure will continue in this manner until the party leaves the dungeons or are killed therein.”
That's the last line of the section entitled Example Of The Referee Moderating A Dungeon Expedition in The Underworld & Wilderness Adventures (Volume 3 of OD&D). It's probably best read in the same voice you'd use for "The beatings will continue until morale improves."
As promised, more maps - Blue Opal House
2 hours ago