“Got the letters, Grant?” demanded Fred of the owner of the secret, who was busily engaged in more calculations. His eyes were half shut and he did a great deal of counting on his fingers.
“Ssh,” hissed George softly, but no one noticed him.
“All right,” said Grant suddenly. “Put r in place of eighteen and t in place of twenty.”
“I’ve got your system,” exclaimed John all at once. “I had an idea before and now I’m quite sure of it.”
“What is it, String?” inquired George eagerly.
“I won’t tell you. Wait and see if I’m right.”
“I thought you said you were.”
“I think I am.”
“Don’t tell him, String, if you know,” urged Grant.
“I won’t; don’t worry about that. Isn’t it simple?”