“That’s someone broadcasting in code,” she declared.
“Sounds more like a mouse chewing a board,” Nancy laughed.
“All the same, it’s code of some sort.” Sally insisted. “And I’m going to figure it out. Trouble is, it comes in low and indistinct.”
“An outside aerial would help, wouldn’t it?”
“Yes, of course.”
“There’s one on top of this building.”
“There is?” Sally exclaimed. “Then we’ll run a wire up to it. But how will we get it up there without being seen?”
“Let’s see.” Nancy counted up to six on her fingers. Then she slipped out through the door.
She was back almost at once with the good news that her room was directly over Sally’s. “We can run the wires along the heat pipes,” she explained. “There’s even a pipe running from my room to the attic, though I can’t see why.”
“Even then we’ll not be on the roof,” Sally mourned.