他们生活中的变化发生得异常突然。此刻，他们还生活在一个幸福的家庭里，要什么有什么。瞬间之后，爸爸就被迫离开——“出差去了”，妈妈是这么讲的。但是她脸色苍白，孩子们明白这是个坏消息。他们不得不离开了他们在伦敦的那个舒适的家，住到了乡下的一座小房子里。现在他们是穷人了，妈妈说。虽然她竭力想让自己的声音听起来高兴一些，无奈双眼中却充满了伤感与忧虑。
The change in their lives comes very suddenly. One minute they are all a happy family, with everything that they want. The next minute, Father has to go away— 'on business', Mother says. But her face is white, and the children know that it's bad news. They have to leave their nice home in London, and go and live in a little house in the country. They are poor now, Mother says. She tries to sound happy, but her eyes are sad and worried.
罗伯塔、彼得和菲利斯也为他们的爸爸担心，但谁都不能一直那么伤感。新生活开始了，处处都充满新奇的冒险。从他们的新家往山下走，有一条铁路，耀眼明亮的铁轨通向伦敦;还有穿山隧道那黑洞洞的大口，在那里火车从黑暗中呼啸而出，就像体型庞大的野兽……
Roberta, Peter, and Phyllis also worry about Father, but no one can be sad all the time. A new life is beginning, with adventures around every corner. And there, down the hill from their new house, is the railway, with its shining lines leading all the way back to London; and the black mouth of the tunnel, where trains come screaming out of the darkness like great wild animals...
