Reference was here made to Boy Scout methods used in the forest. For instance, a stone with a smaller one on top says:
“This is the trail.”
Place a stone to the right of this and the meaning is:
“Turn to the right.”
One to the left means:
“Turn to the left.”
A smaller stone on top of the other two, with none at the side, means: “Be careful.”
“I hope they will keep away,” Ned went on. “It is a miracle, almost, that we got in here without being discovered.”
“What you think you’ll find in there?” asked Jimmie.