Well, they made the trip back to the old field; and Bunny remembered all the adventures of the last ride, the place where they had had lunch, and what the waitress had said, and the place where they had stopped for gas, and what the man had said, and the place where they had run into the “speed-cop.” It was like fishing—that is, for real fish, like you catch in water, not in oil wells; you remember where you got the big fish, and you expect another bite there. But the big fish always come at a new place, said Dad, and it was the same with “speed-cops.” A cop picked them up just outside Beach City, passing a speed-trap at forty-seven miles; and Dad grinned and chaffed the cop, and said he was glad he hadn’t been really going fast. They got to Lobos River that evening; and there was the rig, fishing away—screwing the stands of pipe together and working down into the hole with some kind of grabbing device on the end, and then hauling up and unscrewing—stand after stand, fifty or sixty of them, one after another—until at last you got to the bottom one, only to find that you had missed your “fish!” Well, Dad said his say, in tones that nobody could help hearing. If he couldn’t find men who would take care of their own bones, it was doubtless too much to hope they would take care of his property. They stood there, looking like a lot of school-boys getting a birching—though of course the “roughneck” who was wholly to blame had been turned loose on the road long ago. There was a salesman from a supply house there with a patent device which he guaranteed would bring up the obstacle the first run; so they tried it, and left the device in the hole—it had held on too tight! Evidently there was a pocket down there, and the crowbar had got wedged crossways; so they’d have to try a small chunk of dynamite, said Dad. Ever listen to an explosion four thousand feet under the ground? Well, that was how they got the crowbar loose; and then they had a job of cleaning out, and drilling some more, and setting a casing to cover the damaged place in the hole. Thus, day by day, Bunny got his oil lessons. He wandered about the field with Dad and the geologist and the boss driller, while they laid out the sites for future wells; and Dad took an envelope and pencil, and explained to Bunny why you place your wells on the four corners of a diamond, and not on the four corners of a square. You may try that out for yourself, drawing a circle about each well, to indicate the territory from which the oil is drained; you will see that the diamond shape covers the ground with less overlapping. Wherever you overlap, you are drilling two holes to get the same barrel of oil; and only a dub would do that.