Hoddan began to draw diagrams. The Lawlor drive-unit had been installed long after the yacht was built. It would be modern, with no nonsense about it. With such-and-such of its electronic components cut out, and such-and-such other ones cut in, it would become a perfectly practical ball lightning generator, capable of placing bolts wherever one wanted them. This was standard Zan practice. Hoddan's grandfather had used it for years. It had the advantage that it could be used inside a gravity field, where a Lawlor drive could not. It had the other advantage that commercial spacecraft could not mount such gadgets for defense, because the insurance companies objected to meddling with Lawlor drive installations. * * * * * Hoddan set to work with the remnants of a tool shop on the ancient yacht and some antique coils and condensers and such. He became filled with zest. He almost forgot that he was the skipper of an elderly craft which should have been scrapped before he was born. But even he grew hungry, and he realized that nobody offered him food. He went indignantly into the yacht's central saloon and found his seven crew-members snoring stertorously, sprawled in stray places here and there. He woke them with great sternness. He set them furiously to work on that housekeeping--including meals--which can be neglected in a feudal castle because strong outside winds blow smells away and dry up smelly objects, but which must be practiced in a spaceship. He went back to work. Suddenly he stopped and meditated afresh, and ceased his actual labor to draw a diagram which he regarded with great affection. He returned to his adaptation of the Lawlor drive to the production of ball lightning. It was possible to wind coils. A certain percentage of the old condensers held a charge. He tapped the drive-unit for brazing current, and the drill-press became a die-stamping device for small parts. He built up the elements of a vacuum tube such as is normally found only in a landing grid control room. He set up a vacuum-valve arrangement in the base of a large glass jar. He put that jar in the boat's air lock, bled the air to emptiness, and flashed the tube's quaint elements. He brought it back and went out of overdrive while he hooked the entire new assembly into the drive-circuit, with cut-outs and switches to be operated from the yacht's instrument board. Finished, he examined the stars. The nearby suns were totally strange in their arrangement. But the Coalsack area was a space-mark good for half a sector of the galaxy. There was a condensation in the Nearer Rim for a second bearing. And a certain calcium cloud with a star-cluster behind it was as good as a highway sign for locating one's self.