Vanderschoof looked back. The birds were invisible; he looked again, in the right direction this time and saw them, so much larger and nearer that he cried out. The others ceased their low-voiced conversation at the sound of his voice. "What's the matter, papa?" asked the dancer. "Those birds. Look." "Why it looks almost as though they were following us." She sat upright in the seat and squinted at them under an upraised hand. The queer birds were close enough now so that the difference between their fore-wings and the steadily beating hind wings could be made out. "You don't suppose they could be mad at us?" she asked. "Don't be foolish," said Stevens, without turning around. "Birds aren't intelligent enough for that." A long straight stretch lay before him and he let the car out. Vanderschoof, watching with a trace of anxiety, saw the birds also put on more speed. "They are following us," he declared with conviction. "Look," said Marta Lami, "that one is carrying something, too." As she spoke, the bird, flying high, gained a position just above and ahead of the car, dropped the object and instantly wheeled off and down to one side. There was a heavy thud on the road ahead, and a big rock bounded and rolled a score of feet before the car. Marta Lami screamed. Vanderschoof swore, with feeling. "Get out your guns and drive them off," said Stevens. "You fools, why did you have to shoot at them in the first place?" Before he had finished speaking Vanderschoof had his revolver out and was firing at the second of the birds, now swinging into position above them with another rock. He missed, but the bird, surprised, dropped its burden too soon, and they had the satisfaction of seeing it bounce among the trees at the right of the road. "Keep after them, that's right," said Stevens. "We're not far from the Point and we can get under cover there." Both the men in the back were shooting now—Vanderschoof slowly and with deliberate aim; Pappagourdas in a panic-stricken rafale at the third bird, which, higher than the others, paid not the slightest attention to them but jockeyed for position. Stevens began to twist the steering wheel—the car described a fantastic series of zigzags. "What are they?"