The under surface of it had blunt steel teeth, like a nutmeg-grater; on top of it rested a couple of thousand feet of steel tubing, the “drill-stem,” a weight of twenty tons pressing it down; so, as it turned, it ate into the solid rock, grinding it to powder. It worked in the midst of a river of thin mud, which was driven down through the center of the hollow tubing, and came up again between the outside of the tubing and the earth. The river of mud served three purposes: it kept the bit and the drill-stem from heating; it carried away the ground-up rock; and as it came up on the outside of the drill-stem, it was pressed against the walls of the hole, and made a plaster to keep the walls rigid, so that they did not press in upon the drill-stem. Up on the top of the ground was a “sump-hole,” of mud and water, and a machine to keep up the mixture; there were “mud-hogs,” snorting and puffing, which forced it down inside the stem under a pressure of 250 pounds to the square inch. Drilling was always a dirty business; you swam in pale grey mud until the well came in, and after that you slid in oil.

Also it was an expensive business. To turn those twenty tons of steel tubing, getting heavier every day as they got longer⁠—that took real power, you want to know. When the big steam engine started pulling on the chain, and the steel gears started their racket, Bunny would stand and listen, delighted. Some engine, that! Fifty horsepower, the cathead-man would say; and you would imagine fifty horses harnessed to an old-fashioned turntable with a pole, such as our ancestors employed to draw up water from a well, or to run a primitive threshing-machine.

Yes, it took money to drill an oil well out here in California; it wasn’t like the little short holes in the East, where you pounded your way down by lifting up your string of tools and letting them drop again. No siree, here you had to be prepared to go six or seven thousand feet, which meant from three hundred to three hundred and fifty joints of pipe; also casing, for you could not leave this hole very long without protection. There were strata of soft sand, with water running through, and when you got past these you would have to let down a cylinder of steel or wrought iron, like a great long stove pipe; joint after joint you would slide down, carefully rivetting them together, making a waterproof job; and when you had this casing all set in cement, you would start drilling with a smaller bit, say fourteen inches, leaving the upper casing resting firmly on a sort of shelf. So you would go, smaller and smaller, until, when you got to the oil-sands, your hole would have shrunk to five or six inches. If you were a careful man, like Dad, you would run each string of casing all the way up to the derrick-floor, so that in the upper part of the hole you would have four sets of casing, one inside the other.

All day and all night the engine labored, and the great chain pulled, and the rotary-table went round and round, and the bit ate into the rock. You had to have two shifts of men, twelve hours each, and because living quarters were scarce in this sudden rush, they kept the same bed warm all the time. A crew had to be on the job every moment, to listen and to watch. The engine must have plenty of water and gas and oil; the pump must be working, and the mud-river circulating, and the mixing-machine splashing, and the drill making depth at the proper rate. There were innumerable things that might go wrong, and some of them cost money, and some of them cost more money. Dad was liable to be waked up at any hour of the night, and he would give orders over the telephone, or perhaps he would slip into his clothes and drive out to the field. And next morning, at breakfast, he would tell Bunny about it; that fellow Dan Rossiger, the night-foreman, he sure was one balky mule; he jist wouldn’t make any time, and when you kicked, he said, “All right, if you want a ‘twist-off.’ ” And Dad had said, “ ‘Twist-off’ or no ‘twist-off,’ I want you to make time.” And so, sure enough, there was a “twist-off,” right away! Dad vowed that Dan had done it on purpose; there were fellows mean enough for that⁠—and, of course, all they had to do was to speed up the engine.

Anyhow, there was your “twist-off”; which meant that you had to lift out every inch of your two thousand feet of pipe. You pulled it up, and unscrewed it, four joints at a time⁠—“breaking out,” the men called that operation; each four joints, a “stand,” were stood up in the derrick, and the weary work went on. You couldn’t tell where the break was, until you got to it; then you screwed off the broken piece, and threw it away, and went to your real job, fishing for the remainder of your drill-stem, down in the hole. For this job you had a device called an “overshot,” which you let down with a cable; it was big and heavy, and went over the pipe, and caught on a joint when you pulled it up⁠—something like an iceman’s tongs. But maybe you got it over, and maybe you didn’t; you spent a lot of time jiggling it up and down⁠—until at last she caught fast, and up came the rest of your stem! Then you unscrewed the broken piece, and put in a sound piece, and let it all back into the hole, one stand at a time, until you were ready to start again. But this time you went at the

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