"Wont you explain it all to me?
To begin with, what is electricity ?" Conolly stared rather at this question, and then shook his head.

"I dont know anything about that," he said; "I am only a workman.

Perhaps Lord Carbury can tell you: he has read a good deal about it." Marian looked incredulously at him.

"I am sure you are joking," she said.

"Lord Carbury says you know ever so much more than he does.