thatâs what I call a real snooze!â Chet said enviously.
Frank grinned. âYou should know.â
He braked to a stop at the gate booth as they were leaving the lion enclosure.
âCan I help you?â said a black youth on duty in the booth. Pinned to the pocket of his green park attendantâs uniform was a badge showing his name, Leroy Mitchell.
Frank took out the folder with the X-mark. âWeâre searching for a certain tree.â
The youth glanced at the diagram, then looked up with an expression of puzzled interest. âWhereâd you get this?â
âIt came in the mail,â Frank replied and showed him the envelope.
Leroy Mitchellâs eyes widened. âMan alive! Donât tell me youâre one of those dudes?â
âWhich dudes?â
âThe ones who solve all the mysteriesâthe sons of that famous detective.â
âYou guessed it. Thatâs us,â Frank said. âIâm Frank, and this is my brother Joe.â
Leroy broke out in a friendly grin as he shook hands with the boys. âWait till I tell everyone about meeting you two!â
âHow about the tree,â Frank asked, glancing around. âIf I read this map right, it must be near here.â
The black boy studied the diagram for a few moments. âYeah, itâs got to be that big old hollow oak.â He pointed to a tree about a hundred yards off, on the right side of the road leading away from lion country.
âOkay if we get out and take a closer look at it?â
âSure. I guess so. Nothing dangerous around there. But watch your step.â
âThanks, Leroy.â
âAny time. Nice meeting you guys.â
Frank drove near the hollow oak, then pulled to the side of the road. He and Joe got out.
âThe rest of you had better wait in the car,â Frank suggested.
Biff nodded. âSure.â He and his two friends in the back seat watched as the Hardy boys approached the oak.
âWhat do you think?â Joe asked his brother.
âMaybe thereâs something hidden in it.â Frank stuck his arm in the hollow trunk.
âAnything there?â Joe asked eagerly.
âYes, it feels like an envelope.â Frank picked it up and withdrew his arm. As his hand came out, clutching the white object, Joe turned pale.
âWatch out!â the younger Hardy boy yelled. âLook whatâs on it!â
CHAPTER III
A Trumpeting Tusker
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CLINGING to the envelope was a brown creature, several inches long. It had two crablike front claws, eight legs, and a tail ending in a stinger.
âA scorpion!â Frank gasped, his eyes widening in horrified disgust. The small animalâs tail was curving forward over its back, ready to sting him in the hand. Frank dropped the envelope as if it were red hot!
The same question occurred to both boys.
âIs this what Dad was trying to warn us about?â Joe wondered out loud, still a trifle breathless.
Frank shrugged and ran his fingers through his hair. âMaybe, though I donât see how he could have known Iâd stick my hand in this hollow tree.â
âHe might have known someone would use a scorpion sooner or later to harm us.â
âCould be.â
The loud sound of a put-putting motor caught the Hardysâ attention. Turning, they saw a park guard speeding toward them on a trail bike. He had a visored uniform cap on his head and a holstered weapon on his hip.
Red-faced with annoyance, the burly officer braked his bike and swaggered up to growl at the Hardys. âWhat are you two kids doing out of your car?â
Joe started to explain, but Frank cut him short. âWe got permission from one of the attendants.â
âWhat attendant?â the guard demanded, as if he thought Frank were lying.
âLeroy Mitchell in the gate booth at lion country.â
The guard turned to look in the direction Frank indicated. Leroy,