“You remember the sunburst on the paper?”
“I should say so,” replied Alex. “I’ve got a copy of it right here with me. Why do you bring that mystery up now?”
“There’s a sunburst over there on the smooth wall!” Case said. “The sun shines on the rocks so as to produce the effect of one, anyway.”
“You’ve got to show me!” Alex exclaimed, with a provoking grin.
Case took out his watch and noted the time. Six o’clock.
Alex, puzzled, held the paper he had taken from a pocket out to his chum, asking:
“Six o’clock, you say? Now, look here! On this paper there is a figure six marked by the side of the drawing of the sunburst exactly at the point where the sun now strikes the sunburst on the wall. What does that mean?”
“Well,” Case answered, scratching his head, “there is a seven below the six. We’ll see if the seven stands in the same relation to the sunburst that the six does.”
“What do you mean by that?” asked Alex. “I don’t understand.”
“Look here! The figure six marks where the line of sunlight lies on the wall at six o’clock! That’s easy, isn’t it? Does the figure seven stand so as to show where the line of sunlight will lie on the wall at seven o’clock? Do you get that, muddlehead?”