A carrier pigeon on a passage can achieve a high rate of speed, and Winn reefed again. And again, to his satisfaction, he found that he was beating the pigeon. But this time he quickly shook out a portion of his reefed sustaining surface and slowed down in time. From then on he knew he had the chase safely in hand, and from then on a chant rose to his lips which he continued to sing at intervals, and unconsciously, for the rest of the passage. It was: “Going some; going some; what did I tell you!--going some.” Even so, it was not all plain sailing. The air is an unstable medium at best, and quite without warning, at an acute angle, he entered an aerial tide which he recognized as the gulf stream of wind that poured through the drafty-mouthed Golden Gate. His right wing caught it first--a sudden, sharp puff that lifted and tilted the monoplane and threatened to capsize it. But he rode with a sensitive “loose curb,” and quickly, but not too quickly, he shifted the angles of his wing-tips, depressed the front horizontal rudder, and swung over the rear vertical rudder to meet the tilting thrust of the wind. As the machine came back to an even keel, and he knew that he was now wholly in the invisible stream, he readjusted the wing-tips, rapidly away from him during the several moments of his discomfiture. The pigeon drove straight on for the Alameda County shore, and it was near this shore that Winn had another experience. He fell into an air-hole. He had fallen into air-holes before, in previous flights, but this was a far larger one than he had ever encountered. With his eyes strained on the ribbon attached to the pigeon, by that fluttering bit of color he marked his fall. Down he went, at the pit of his stomach that old sink sensation which he had known as a boy he first negotiated quick-starting elevators. But Winn, among other secrets of aviation, had learned that to go up it was sometimes necessary first to go down. The air had refused to hold him. Instead of struggling futilely and perilously against this lack of sustension, he yielded to it. With steady head and hand, he depressed the forward horizontal rudder--just recklessly enough and not a fraction more--and the monoplane dived head foremost and sharply down the void. It was falling with the keenness of a knife-blade. Every instant the speed accelerated frightfully. Thus he accumulated the momentum that would save him. But few instants were required, when, abruptly shifting the double horizontal rudders forward and astern, he shot upward on the tense and straining plane and out of the pit. At an altitude of five hundred feet, the pigeon drove on over the town of Berkeley and lifted its flight to the Contra Costa hills. Young Winn noted the campus and buildings of the University of California--his university--as he rose after the pigeon.