reached the outer lobby, the men were gone.
âThey didnât go out the front door,â Violet said. âWe wouldâve seen them.â
Henry was baffled. âBut they couldnât just ⦠disappear!â
âLook, Henry!â Jessie pointed to the doors Henry had tried earlier. One of them was open.
âLetâs ask Willard where it leads,â Violet suggested.
But Willard was busy outside.
And Benny was already across the room. His brother and sisters followed. They slipped through the door and came upon a stairwell. They heard voices below, and then ⦠nothing.
Taking the lead, Henry crept down the stairs. The others stayed close behind him.
At the bottom of the stairs was another door. Slowly, cautiously, Henry cracked it open and peeked into the dimness beyond.
Henry let out a soft whistle. Then he said, âWow!â
âWhat is it, Henry?â Jessie murmured.
Henry opened the door. There in the murky light was a lone railroad coach!
Stunned, they moved outside to the walkway. They wondered where the car had come from and why it was there.
After a long silence, Violet said, ââA place like homeâ! The clue was about our home in the boxcar!â
ââResting on/A bed of stone,ââ Jessie quoted.
âGravel, or stone, is used to make railroad ties stable,â Henry said.
âWeâve solved the final clue!â Violet said.
But the mystery was yet to be fully explained. They still had no idea who was behind this strange treasure hunt â or the reason for it.
Henry motioned them to stay where they were. He sneaked up onto the observation platform and peered through a window.
âWhat do you see?â Violet asked.
Suddenly a voice behind her said, âI see youâve found the treasure I think best.â
Jessie, Violet, and Benny spun around. Their mouths dropped open in surprise. âYou!â
Jacob Piper pulled off a fake mustache and one bushy eyebrow.
Just then, Grandfather appeared on the platform beside Henry. âI told you, Cob,â he said. âMy grandchildren are smart. I knew theyâd figure out our little game.â
Jacob Piper and Grandfather! Together, they were responsible for this baffling mystery!
Mr. Piper climbed onto the platform. âCome on aboard.â
Astonished, the children followed him.
Cob swept his arm in a circle. âWelcome to my home.â
Benny stared at him. âYou live here?â
Cob laughed. âItâs very comfortable,â he said. He proudly showed them everything: a desk that opened into a large table; chairs that turned into beds; a stainless steel kitchen, where something bubbled on the compact stove.
âThat smells good,â Benny said.
âSpaghetti sauce for our supper,â Cob told him.
Questions swirled through the Aldensâ minds, but they were too amazed to ask them. Still, the two men provided answers.
Grandfather said, âWhen I told Cob you like mysteries, he planned this treasure hunt.â
âIt was a good way for you to see my favorite city,â Mr. Piper told them. âBut I was afraid you wouldnât solve it. I wanted to tell you. Your grandfather and I argued about it.â
That explained the telephone calls.
âI was worried about the whole thing,â Mr. Alden continued. âI didnât know how I was going to give you the clue at the Water Tower. Fortunately, Jessie, you dropped the maps. I slipped the envelope in with them.â
âAnd I just missed seeing Chad at the Art Institute,â Mr. Piper said.
Henry found his voice. âSo Chad didnât know.â
Mr. Piper shook his head. âI was afraid heâd give it away.â
âHow about Willard?â Benny asked.
âHe knew something was going on, but he never figured it out.â Cob held up the mustache. âIâm not very good at this disguise business.â
Benny snickered.
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