"Open the door!" he called out.

"I can't," was the answer, in a young child's voice. "It's locked."

"Can't you turn the key?"

"No; I don't know how."

"You will have to get through the transom," said the clerk. "If we only had a step-ladder."

"Lift me up and I'll get through," said Rupert. "I have practiced in a gymnasium."

"Very well, if you think you can."

The clerk bent over, and Rupert, standing on his shoulders, was lifted so that he could reach the transom.

Then, by a skillful movement, he raised himself still farther till he could look inside.