answer: Tom told Carol that there was a telegram about Carol's family's illness for Carol. Carol was trembling before she read the telegram. When Carol found the telegram was for a 'Carl' instead, she was relieved.
documents: #Person1#: Something very unusual happened to me this morning.
  #Person2#: Really? What was it?
  #Person1#: I was studying in the classroom when Tom came rushing in.
  #Person2#: Yes?
  #Person1#: He told me there was a telegram for me at the gate house! Someone was ill in my family.
  #Person2#: Goodness me! I hate telegrams. They seldom bring any good news.
  #Person1#: Yes, that's just how I felt. My legs turned to water, so I asked Tom to accompany me to the school gate.
  #Person2#: I can imagine how you felt.
  #Person1#: On my way to the school gate I was thinking terrible things. What could have happened at home, you know, and all that.
  #Person2#: Yes, of course. I understand.
  #Person1#: So when I tore the telegram open, my fingers were trembling.
  #Person2#: Dear me!
  #Person1#: But when I read the telegram, I just couldn't make heads or tails out of it.
  #Person2#: How strange! What did it say?
  #Person1#: It said: Return immediately. Uncle seriously ill.
  #Person2#: Oh, I am sorry to hear that.
  #Person1#: But the surprising part about it is that I have no uncle.
  #Person2#: Indeed!
  #Person1#: I could hardly believe my own eyes. But it was written there in black and white. Then I happened to glance at the address to a 'Carl', not 'Carol'.
  #Person2#: Well, I never!
  #Person1#: You can never imagine how relieved I was.
  #Person2#: Yes. What a relief! But what did Tom have to say?
  #Person1#: Tom was so embarrassed. He kept apologizing all the way back.
  #Person2#: He has always been quite careless.