On the tenth day of June, Dr. Anderwelt had written me as follows:

"Please catch the 7.25 train on the Lake Shore for Whiting this evening. I will take the same train, and we will walk from Whiting to a deserted railway siding two miles further on, where the projectile has been shipped. We will unload it from the flat car and take it into a grove of scrub oaks on the shore of Lake Michigan, near by. This will be enough to demonstrate to you our control of gravity. The experimental model is there also, and we will send it off on a trip if you like. Everything will be ready for the start to Mars to-morrow night."

I dined early and caught the train specified at Twenty-Second Street. The doctor was looking for me from the rear platform of a car. It was a local train, and crept slowly out through the smoky blackness of South Chicago, illuminated here and there by the flaming chimneys of her great iron furnaces, to the little city of pungent smells, of petroleum tanks and oil refineries, in Northern Indiana. The doctor was explaining the difficulties he had experienced in getting a companion for the trip.

"Men whom I could hire for mere wages are not intelligent enough to understand the workings of the projectile, or to comprehend the risks they may run. Besides, their companionship and assistance during the trip through space and on a new planet is worth nothing. On the other hand, I could not afford to go about explaining the workings of so important an invention miscellaneously to people capable of understanding it in an experimental search for a companion. I might not find one among twenty, and I would be tossing my secrets to the winds, and inviting all the daily papers to send their representatives to report the start. My reputation as a scientist, on the other side, is too dear to me to risk a public failure. If the projectile acts, as I am confident it must, on our return we shall take out letters patent and form our company to exploit the business features. But primarily, this is a test of the projectile and a journey of exploration and research. Business afterward."

Naturally on this point we had disagreed. My motto had always been "Business first!" and I had desired to have the patents secured immediately. But the doctor would not consent to the filing of the required specifications and claims, lest his secrets should be learned before success was demonstrated. As a compromise, the doctor had agreed to leave the necessary descriptions and data in a sealed envelope with me, which I was to be at liberty to open and place on record at any time during the doctor's absence that I might deem it necessary in order to protect our rights.

"Whom have you finally secured to go with you, then?" I asked.

"I will tell you that after we have finished to-night's work," said the doctor, and then abruptly changed the subject.

The walk from Whiting was inspiriting. It was a beautiful night. There was not a cloud in the sky and no Moon, which made the stars all the brighter. Everything was still, save the constant lapping of the great lake on the sandy shore, but a short way off.

"Yonder is the mustard seed planted in the heavens, which shall grow into a whole new world for us!" exclaimed the doctor, pointing out a particularly bright star. "That is Mars rushing on to opposition. In six weeks he will be nearest to the Earth; so for that time he will be flying to meet us. To-morrow is our last day on Earth; to-morrow night the ether! And in six weeks, diminutive but mighty man will have known two worlds!"

"There you go, soaring again!" I cried. "Let us keep on practical subjects. What have the foundry people who built this thing, and the railroad people who brought it down here, thought about its probable use? Have they not guessed something?"