"Come here!" said Pamela.
She took up the instrument and placed it on her friend's head. It had a band which fitted across the forehead, and a receiver for each ear. A cord connected it with the wall.
"Do you hear anything?" asked Pamela.
"Yes, a sort of humming."
Pamela smiled significantly, and put back the instrument on the table.
"What is it?" breathed Avelyn, rather awed.
"Wireless messages. Uncle spends hours here."
"Do you mean to say this is a wireless station?"
Pamela nodded.
"But they're not allowed."