Another concession Dad made—wherever the bend was to the right, so that the mass of the mountain obstructed the road, he sounded his horn. It was a big, commanding horn, hidden away somewhere under the capacious hood of the car; a horn for a man whose business took him on flying trips over a district big enough for an ancient empire; who had important engagements waiting at the end of his journey, and who went through, day or night, fair weather or foul. The voice of his horn was sharp and military; there was in it no undertone of human kindness. At fifty miles an hour there is no place for such emotions—what you want is for people to get out of the way, and do it quick, and you tell them so. “Whanhnh!” said the horn—a sound you must make through your nose, for the horn was one big nose. A sudden swing of the highway—“Whanhnh!”—and then an elbow jutting out and another swing—“Whanhnh!”—so you went winding up, up, and the rocky walls of Guadalupe Pass resounded to the strange new cry—“Whanhnh! Whanhnh!” The birds looked about in alarm, and the ground-squirrels dived into their sandy entrance-holes, and ranchmen driving rickety Fords down the grade, and tourists coming to Southern California with all their chickens and dogs and babies and mattresses and tin pans tied onto the running-boards—these swung out to the last perilous inch of the highway, and the low, swift roadster sped on: “Whanhnh! Whanhnh!” Any boy will tell you that this is glorious. Whoopee! you bet! Sailing along up there close to the clouds, with an engine full of power, magically harnessed, subject to the faintest pressure from the ball of your foot. The power of ninety horses—think of that! Suppose you had had ninety horses out there in front of you, forty-five pairs in a long line, galloping around the side of a mountain, wouldn’t that make your pulses jump? And this magic ribbon of concrete laid out for you, winding here and there, feeling its way upward with hardly a variation of grade, taking off the shoulder of a mountain, cutting straight through the apex of another, diving into the black belly of a third; twisting, turning, tilting inward on the outside curves, tilting outward on the inside curves, so that you were always balanced, always safe—and with a white-painted line marking the centre, so that you always knew exactly where you had a right to be—what magic had done all this?