Lord John was delighted with the whole idea. “Clever old dear, ain’t he?” he whispered to me, and then louder to Challenger. “What about a car?”

“The car will be my next care. I have already planned how it is to be made and attached. Meanwhile I will simply show you how capable my apparatus is of supporting the weight of each of us.”

“All of us, surely?”

“No, it is part of my plan that each in turn shall descend as in a parachute, and the balloon be drawn back by means which I shall have no difficulty in perfecting. If it will support the weight of one and let him gently down, it will have done all that is required of it. I will now show you its capacity in that direction.”