"That's bad dope, Bob," said Mr. Waterman. "You should never leave camp without your compass nor without first noting carefully in which direction you are going."
"I know that," said Bob. "I just forgot it."
"Which direction did we take this morning?" queried Mr. Waterman.
"We first went east to the end of the lake, and since then we have been going mainly in a northerly direction."
"That is right," was the reply. "Now, if you can tell me which way is south, we can at least go in the right direction."
"We're going south now, aren't we?" asked Bob.
"No," Mr. Waterman replied. "We are going north, or nearly so."
He then pulled out his compass and showed Bob that this was so.
"Now, supposing we had no compass, how would we be able to tell the points of the compass?" asked Bob.
"By the sun," answered Mr. Waterman, in his usual, quiet way.