my heart beat!â It pounded with the excitement of danger.
The men took another step forward. Suddenly a heavy boot came down squarely on Joeâs back. The boy let out a scream and jumped to his feet. Frank did the same.
Their double action stunned their pursuers momentarily. With an elbow thrust Joe knocked the wind out of the pilot, who had stepped on him. Frankâs left jab caught Zinn flush on the chin. He fell over backward and lay still.
Without a word, Frank and Joe snatched up the menâs flashlights.
By the time the two regained consciousness, the Hardys were well out of sight. All the boys could hear were curses behind them.
âWe nearly got it that time,â Frank said, pulling himself out of the edge of the swamp onto firmer ground.
âBut weâll have to look out for Nick, whoever he is,â Joe warned.
They tossed the big flashlights on the ground. Making their way in total darkness, the young detectives climbed the short embankment and reached the side of the road. Around a curve came two headlights. Frank and Joe ducked for cover again.
A car drove by slowly and a spotlight flashed across the marsh. But the cattails gave perfect cover to the boys. The car turned about and drove back toward the airport.
Minutes later Frank and Joe stood beside the road again, cold, wet and muddy, peering into the darkness.
âLucky the girls are waiting for us,â Frank said and took out his pencil flashlight. He gave a long beam, then three short ones. Several minutes went by, but there was no sign of the convertible.
An owl hooted in the distance, and the growl of an engine sounded as another plane took off.
âThatâs strange,â Joe observed. âWhy do you think the girls donât react?â
âI donât know,â Frank replied. âLet me give them a couple more signals.â He flashed the light again. Still no response.
âGood night!â Joe said worriedly. âDo you suppose somethingâs happened to Callie and Iola?â
CHAPTER XI
No More Rocks
HAD the mysterious Nick come upon Iola and Callie in their hiding place? If so, the girls might be in danger!
Frank and Joe hastened along the edge of the road, giving the flashlight signal.
Suddenly, from a turnoff in the woods, a pair of headlights snapped on. For several seconds they glared into the darkness, then they went off, only to reappear in three quick blinks.
âOur signal!â Frank exclaimed, running toward the place of concealment. Joe followed him in full stride.
There was the convertible, backed into a clump of big bushes, between a stand of pine trees. Callie and Iola stepped out to meet the boys.
âAre we glad to see you!â Callie said, grabbing Joeâs right arm with both her hands.
âSame here,â Joe replied.
Iola said, âWe thought youâd never come back! What happened?â
âDidnât you see our signal?â asked Frank. âYou really had us worried.â
âOf course we saw it,â Callie answered. âBut there was another car patrolling the road. We couldnât reveal our position!â
âGood thinking,â Frank said. âWe saw that car, too. Some guy named Nick was out to find us.â
âWhoâs he?â
âHeâs part of the mob,â Joe said as the boys climbed into the convertible. Briefly they told what had happened and pledged the girls to secrecy.
He slid behind the wheel and drove onto the highway, but instead of turning to the airport, he took the opposite route back toward Beemerville.
âWhere are you going?â Iola inquired.
âThis Nick might still be watching for us around the airport entrance,â Joe replied. He explained that he would take an alternate route which would bring them into Bayport on a parallel road. After about three miles, Joe took a left turn and made a long detour to a secondary highway. He kept the car at speed limit all the