How did the jester find his way out of the maze in the dark? He had
simply to grope his way to a wall and then keep on walking without once
removing his left hand (or right hand) from the wall. Starting from A,
the dotted line will make the route clear when he goes to the left. If
the reader tries the route to the right in the same way he will be
equally successful; in fact, the two routes unite and cover every part of
the walls of the maze except those two detached parts on the left-hand
side--one piece like a U, and the other like a distorted E. This rule
will apply to the majority of mazes and puzzle gardens; but if the centre
were enclosed by an isolated wall in the form of a split ring, the jester
would simply have gone round and round this ring.