from Northport the day of the bank robbery. Is he linked with both cases? And is his pal Sutton? And where do the fights at Shantytown fit in?â
âThatâs for us to find out,â Frank said determinedly. âEspecially since the answer might lead us to Chet and Biff. Weâre pretty sure they were in Shantytownâsince we found Chetâs gorilla mask off the coast there, and his sleeve was picked up behind Suttonâs shack.â
The excitement suddenly faded from Joeâs face. âMaybe our hunches are on the wrong track. After all, Fizzle could be sold in other places besides Northportâand we have no proof the bald guy left the bottle in the Sleuth.â
âDonât be a pessimist,â Frank begged. âRemember what Dad says: âPersistence is just as important as cleverness in detective work.â â
âYes, and a little luck helps, too. Donât worry. Itâs just that we have so many mysteries to solve. Which one do we tackle next?â The ringing of the telephone interrupted. Frank answered.
âGlad to find you home,â came Chief Colligâs familiar voice. âMaybe you can help me. We have a man down hereâbeen brought in for stealing. He seems to think you and Joe can clear him.â
âJoe and I?â repeated Frank, astonished. âWhy ... whatâs his name? What does he look like?â
âHeâs a big, strong fellowâa stevedore. Calls himself Alf.â
CHAPTER XI
Midnight Caller
âALF Lundborg a thief!â Frank exclaimed. âI canât believe it! Weâll be right down, Chief Collig,â he promised.
âI donât buy it,â Joe said flatly as they started out. âWhatâs the pitch?â
Frank shrugged and hurried off to inform his mother of the errand, while Joe locked the laboratory. Then the brothers rushed downtown on their motorcycles to Chief Colligâs office.
âWhereâs Alf?â asked Joe, looking around as he entered.
âWeâre holding him in a cell until I talk to you boys,â the officer explained.
âHeâs the man we told you about yesterday,â Frank reminded the chief. âThe one who helped us in Shantytown. If it hadnât been for him, Sutton would have cracked my skull with a blackjack.â
âI remember,â the chief replied. âSuttonâs the cause of his arrest.â Before the surprised boys could speak, he added, âIâll let Lundborg tell you himself.â Over his intercom he ordered the suspect brought in.
âI donât believe Alfâs a thief,â Frank said.
âBut he does have a record for petty theft and disturbing the peace,â Chief Collig said soberly. âThat makes it look bad for him.â
âHow long ago was that?â Joe asked.
âAlfâs last brush with the law was five years ago,â Collig replied. âHe claims he was just a wild kid at the time.â
The door opened and Alf stood on the threshold. His giant frame almost hid the sergeant behind him. When he saw the Hardys, his troubled face lighted up instantly.
âI knew you fellows wouldnât let me down,â he burst out. âTell the chief I didnât take it!â
âTake what, Alf?â said Frank.
âThe police found a transistor radio in my knapsack,â the big man explained, âbut I didnât put it there!â
âSutton reported it stolen,â the officer said. âWe sent out Lieutenant Daley to investigate, and he found it in Lundborgâs bag.â
âIs Lieutenant Daley still here?â Frank asked. âWould you have him come in?â Collig nodded.
A few minutes later a tall, thin-faced officer entered. He and the Hardys had known one another for years and exchanged greetings. âLieutenant Daley,â Frank said, âwhen you were hunting for the radio who suggested that you look in Alfâs