“Even if they could find it, how could they get away with it?” inquired Tom.
“That’s easily done,” explained the captain, “when they find it.”
“When!” interrupted Tom.
“Maybe only a matter of days,” returned the captain. “They will signal to the other ship, put it in a keg, drop it over and the others will pick it up.”
“A keg,” queried Jo. “I saw a keg floating in the wake of our ship just a little while ago.”
CHAPTER XV.
THE CHART.
“Indeed! Then you had better investigate your hiding place and see if your chart is secure.”