A/N Bill's the leader of the twins, so he tells his and Ben's intro.

Hey, it's me, Bill. I've got a twin, name of Ben and a story about us and a diesel whose name's Boco.

We're tank engine twins. We each got four wheels, a tiny chimney and dome, and a small squat cab. Our freight cars are filled with china clay. It is needed for pottery, paper, paint, and many other things.

We were kept busy pulling the cars for engines on the main line-and for ships in the harbor.

One morning, we arranged some cars and went away for more.

We returned to find them all gone. We were most surprised.

Our drivers examined a patch of oil. "That's diesel," they said.

"It's a what'll?" I asked.

"A diseasal, I think," replied Ben. There's a notice about them in our shed. "'Coughs ad sneezles spread diseasels.' You had a cough in your smoke box yesterday. It's your fault the diseasel came."

"It isn't."

"It is." My brother got us arguing.

"Stop arguing, you two," laughed our drivers. "Let's go and rescue our freight cars."

We were horrified. "But the diseasel will magic us away, like the freight cars."

"He won't magic us," replied our drivers. "We'll more likely magic him. Listen-he doesn't know you're twins. So we'll take away your names and numbers, and then this is what we'll do..." The drivers had a plan, which we found out.

Puffing hard, we set off on our journey to find the diesel. We were looking forward to playing tricks on him. A lot of tank engines are cheeky, like us.

Creeping into the yard, we found the diesel on a siding with the missing cars. Ben hid behind, but I went boldly alongside. He's more timid, compared to me, more of a follower.

The diesel looked up. "Do you mind?"

"Yes," I said. "I do. I want my cars back."

"These are mine," said the diesel. "Go away." He must've thought our cars were his.

I pretended to be frightened. "You're a big bully," I whimpered. "You'll be sorry." I ran back and hid behind the cars on the other side. It was my brother's turn.

Ben now came forward.

"Car stealer!" hissed Ben

He ran away too.

I took his place.

This went on and on till the diesel's eyes nearly popped out. "Stop! You're making me giddy."

We gazed at him.

"Are there two of you?"

"Yes, we're twins."

"I might have known it." We made him think we were just one engine until the end, when we revealed ourselves as twins.

Just then Edward bustled up. "Bill and Ben, why are you playing here?" Edward, that wise old blue engine, knew how cheeky we could be. But he knows all about cheeky tank engines even before he met us, because of Thomas, his old friend and mentee.

"We're not playing," I protested.

"We're rescuing our cars," squeaked Ben. "Even you don't take cars without asking, but this diseasel did." My brother still called Boco, as the diesel told us was his name, seemingly, a diseasel for taking our cars, confusing them with his.

"There's no cause to be rude," said Edward, severely. "this engine is a Metropolitan Vickers Diesel-Electric, Type 2."

We were most impressed. "We're sorry, Mr. _er..."

"Never mind," the diesel smiled. "Call me Boco. I'm sorry I didn't understand about the cars."

"That's all right then," said Edward. "Now off you go, Bill and Ben. Fetch Boco's cars- then you take this lot." Now, Edward and Boco knew what had happened. Edward knew Boco thought our cars were his, but Boco understood the situation as well. He had mixed up our cars with his. After telling us to get Boco's cars, Edward spoke to him, telling the diesel about us.

"There's no real harm in them," he said to Boco, "but they're maddening at times."

Boco chuckled. "Maddening," he said, "is the word." We heard their talking as we left.

A/N I'm not British, they are. I use their dialect as much as I can stand, but fall into mine with words that were changed in my country's dub.