“There!” Her voice rose as there came the sound of an airplane motor. “There’s a plane! Someone is with her. They must have stolen a plane. They will get away!”
Two guards came racing up. “Oh! It’s you!” the taller of the two said. “What’s up? What happened?”
“A woman spy was going over the cargo of our plane!” exclaimed Mary. “She saw too much. She may have taken something with her. We’ve got to catch her.”
“The Lady in Black Knows the Secret of Our Cargo!”
“That must be her plane warming up!”
“Did she have a plane? Why was she allowed to land?” Sparky demanded.
“No plane has come in tonight.”