many drawbacks. The planet is only 483 miles in diameter. It, at present, has no atmosphere. Being frozen, it will have to be thawed. Obviously, it cannot, at present, support Plymouth Rock chickens, much less human beings. I must now determine velocity, orbit, year, and day.

A month later he wrote in his diary:

Money will be needed. Much more than can be supplied by discovering juncture faults. Plymouth Rock chickens need worms; worms perhaps need Plymouth Rock chickens. One finds it necessary to grow corn also. Gravity lugs must be installed deep in the ground. Gravity lugs are expensive. An interesting fact is that in four weeks this planet will intersect the plane of the ecliptic. Something can be done with this information.

Harvey determined the major and minor apices of the "perp" planet. He determined its point of intersection with the plane of the ecliptic. Then he went to the planet Earth, and came into a sleek landing at the New York spaceport. He went to the information window, asking for and receiving the time-schedules of all lines sending freight or passenger ships between the planets. He studied them for a week in his hotel room. He went back to the information desk to confirm his findings.

The clerk was most helpful. Yes, the liner Hermes of the firm of Gramenger & Lewis would leave Venus at 7:17 Solar Standard time on a Wednesday three weeks from now bound for Titan of Saturn. The space coordinates Harvey had figured out were correct. Yes, the shipping firm of Gramenger & Lewis would not dare change the trajectory or the schedule on as little as three weeks notice. To do so would involve loss of prestige as well as of millions of dollars in contracts and passenger fees. Harvey thanked him and went to the Claims Registration Office on Luna.

"I wish," he told the official, "to register prior discovery and ownership of a planet whose orbit lies perpendicular to the plane of the ecliptic."

The official doubted very much that any "perp" planets remained to be discovered, telling Harvey they were useless anyway. Harvey did not laugh.

The official spent an hour poring over catalogues, showing increasing amazement. Finally he said, "You're in luck!"

At the end of an hour he had found Harvey's planet in numerous photographs, and had taken readings on the orbit which exactly coincided with Harvey's figures. He made out the necessary papers. Now Harvey owned a planet.

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