"I'm not sleepy," Jack returned in a disgusted tone. "I use my nights for that purpose," he added turning his eyes toward the southern end of the island.
As Bob started for the cabin Jack arose and leaned on the rail. "Just a minute, Bob," he said, and Bob quickly returned to his side.
"What is it?"
"Look over there just at the top of that knoll."
"I don't see anything."
"Keep your eyes glued on it while I get the glasses," Jack ordered. "I saw something move there."
He was back in less than a minute. "Seen anything?" he asked.
"Lots of sand," Bob replied.
For a minute Jack gazed through the glasses and then handed them to Bob.
"Look just to the right," he ordered.