内容简介：
Steve Packard's pulses quickened and a bright eagerness came into his eyes as he rode deeper into the pine-timbered mountains. To-day he was on the last lap of a delectable journey. Three days ago he had ridden out of the sun-baked town of San Juan; three months had passed since he had sailed out of a South Sea port. Far down there, foregathering with sailor men in a dirty water-front boarding-house, he had grown suddenly and even tenderly reminiscent of a cleaner land which he had roamed as a boy. He stared back across the departed years as many a man has looked from just some such resort as Black Jack's boarding-house, a little wistfully withal. Abruptly throwing down his unplayed hand and forfeiting his ante in a card game, he had gotten up and taken ship back across the Pacific. The house of Packard might have spelled its name with the seven letters of the word "impulse."