Yes, some continuous wall, but not an *arbitrary* continuous wall (which is what your Post #19 implied by the the phrase “... a wall, left or right...”).
For example, you enter a maze and find a rectangular room in front of you that is disconnected from the rest of the maze. You enter that room and put your hand on the wall. If you follow only that wall you will just go round and round the room, both inside and outside the room.
So, we finally found out, if not WHERE he is, what happened to Waldo.