Percy heard about the trip from James, who had in turn overheard the discussion between Gordon and his wife, Molly.
"I want to go with him!" He exclaimed.
"You can't, Percy." James replied, trying to make his little brother see sense. "You're to stay with us. He'll only be gone for a few days."
But Percy wasn't interested. He wanted to go to London with Gordon and be there for him when he saw his brother.