T. B. flashed the light of his indispensable and inseparable little electric lamp into the dark interior.
"I will go in first and see what happens," he said.
"I think we will both go together," said Ela grimly.
"There is a switch here," said T. B.
He pulled it down and a small lamp glowed, illuminating a tiny lift cage.
"And here I presume are the necessary controlling buttons," said T. B., pointing to a number of white discs; "we will try this one."
He pressed the button and instantly the cage began to fall. It came to a standstill after a while and the men stepped out.
"Part of the old working," said T. B.; "a very ingenious idea."
He flashed his lamp over the walls to find the electrical connection. They were here, as they were at the other end, perfectly accessible. An instant later the long corridor was lighted up.