The next day, The Fat Controller sent Henry up the line to Peel Godred. He told him the holidaymakers would be enjoying the sights and the area needed some clearing.

Henry knew the line well. Long ago, sightseers had traveled on the line and along trails through the hills for grand days out. Old Bailey the Stationmaster worked at one of the stations on the line. It wasn't used often, but it was still Really Useful.

Henry worked hard all day puffing up and down the line helping to clear overgrown bushes and broken branches from the sides of the track.

When night fell, Henry had stopped near a grove of thick trees and an old siding. There was no one else for miles around. The fog had come down and Henry was eager to leave. When his Driver and Fireman returned, Henry let of steam and whistled loudly. "Easy, old boy," said his Driver. "What's bitten you?"

"Just settling my nerves," Henry replied.

"I know the feeling," said the Fireman. "Even now, this place can be creepy at night."

Suddenly...Henry thought he heard something. He froze. "Not ghosts again," he quivered. He could well remember what happened the last time he had been there when fog was about.

The sound came again. "What was that?" said Henry's Driver. They all listened carefully…and heard the sound again. It sounded like a voice was calling out to them, but they couldn't understand what it was saying.

"What's going on?" Henry shivered.

"I don't know," said his Driver. "Who's there?!" he called, but only the sound returned. "Well, whatever it is, there's too much fog to find out what. We'll come back to tomorrow to investigate." And Henry uneasily set off back to Tidmouth.

Henry wasted no time getting back to the Sheds.

"What's the matter with you, Henry?" asked Gordon cheerfully.

"Did you see ghosts again?" laughed James.

"No," said Henry quickly, "but…I did hear something."

"What happened?" Edward asked.

Henry told the other engines what had happened.

"I think it was a workman playing a trick on you," said Gordon.

"But the workmen had already left," Henry protested.

"He could've snuck back when you weren't looking."

"The fog usually plays tricks on us," said Edward. "Maybe you only thought you heard something strange or there was a noise from something, but you just couldn't see what it was."

"But if I was just hearing things, then how did my Driver and Fireman here it too?" Henry added.

None of the engines had an explanation for that.

Later that night, Henry was having trouble sleeping. "I would feel better if I did know what was making that sound," he said to himself.

Thomas thought. "First Edward says the Little Blue Engine was real and now, you think you heard something on the line where he disappeared?" he said. "This is very strange."

Next morning, Henry was nervous about leaving the shed. The Fat Controller soon found out why. "I'm sorry, Sir, but I don't know what I heard," insisted Henry, "and who knows what we may find there."

"Henry," said Edward, "do you remember when you thought there was a monster in your tunnel and what about the last time you went up that line and thought there was a ghost in the Old Station?"

Henry thought. "We'll, the monster in the tunnel was only an elephant and the ghost in the Station was Old Bailey, but if it wasn't a monster or a ghost, then what did I hear last night?"

Thomas felt sorry for Henry, and he wanted to help his friend. "Sir, can I work with Henry today?" he asked. "The work might go faster with two engines, and we can find out what that sound was together." The Fat Controller wasn't sure, but agreed, and Henry felt much better.

So, Thomas and Henry set off up the line with the empty trucks and flatbeds. Harvey was there too. He was going to help the workmen clear the mess. The three engines worked hard clearing the old branches and bushes and inspecting the line for damage.

At last, evening came. Thomas had stopped to rest on the old siding near the thick grove of trees. His Driver and Fireman had left to speak with the Foreman. Thomas knew the old line usually got foggy at night and even though he was sure there were no ghosts or monsters, he still didn't like fog and was eager to leave. He wheeshed steam impatiently…when he heard something.

Thomas looked around. He couldn't see anyone nearby. He listened again…and shuttered. It sounded like a voice, but he couldn't understand it. What if there is a ghost? he thought, or a monster? "Who's there?" Thomas called quietly. With no one in his cab, he couldn't move.

Thomas' Driver and Fireman soon returned. "What's up, Thomas?" asked the Fireman.

"I heard something," Thomas said. "I think it's what Henry heard."

"Don't be daft," said his Driver. "There are no such things as ghosts or monsters."

But then, the sound came again. "Well, that's not our imaginations," said the Fireman. "Something's out there."

"It's coming from the trees," said the Driver. "I'll get help."

Soon, Henry arrived with Harvey. Some workmen started clambering through the trees; they were thick and tall.

Then, there was a 'splash.' "Yuck," one man said. "There's a swamp in here."

The water wasn't too deep, so they carried on. They could still here the sound and they seemed to be getting closer.

…

"WELL, I NEVER DID!" someone cried. The rest of the workman came to look and they could hardly believe what they saw.