That night, armed guards patrolled the grounds. But there was no explosion. Yet, in the early morning Peter Winn learned by telephone that his sister's home in Alameda had been burned to the ground. Two days later the pigeon was back again, coming this time by freight in what had seemed a barrel of potatoes. Also came another letter: Mr. Peter Winn, RESPECTABLE SIR: It was me that fixed yr sisters house. You have raised hell, aint you. Send ten thousand now. Going up all the time. Dont put any more handicap weights on that bird. You sure cant follow her, and its cruelty to animals. Peter Winn was ready to acknowledge himself beaten. The detectives were powerless, and Peter did not know where next the man would strike--perhaps at the lives of those near and dear to him. He even telephoned to San Francisco for ten thousand dollars in bills of large denomination. But Peter had a son, Peter Winn, Junior, with the same firm-set jaw as his fathers, and the same knitted, brooding determination in his eyes. He was only twenty-six, but he was all man, a secret terror and delight to the financier, who alternated between pride in his son's aeroplane feats and fear for an untimely and terrible end. “Hold on, father, don't send that money,” said Peter Winn, Junior. “Number Eight is ready, and I know I've at last got that reefing down fine. It will work, and it will revolutionize flying. Speed--that's what's needed, and so are the large sustaining surfaces for getting started and for altitude. I've got them both. Once I'm up I reef down. There it is. The smaller the sustaining surface, the higher the speed. That was the law discovered by Langley. And I've applied it. I can rise when the air is calm and full of holes, and I can rise when its boiling, and by my control of my plane areas I can come pretty close to making any speed I want. Especially with that new Sangster-Endholm engine.” “You'll come pretty close to breaking your neck one of these days,” was his father's encouraging remark. “Dad, I'll tell you what I'll come pretty close to-ninety miles an hour--Yes, and a hundred. Now listen! I was going to make a trial tomorrow. But it won't take two hours to start today. I'll tackle it this afternoon. Keep that money. Give me the pigeon and I'll follow her to her loft where ever it is. Hold on, let me talk to the mechanics.” He called up the workshop, and in crisp, terse sentences gave his orders in a way that went to the older man's heart. Truly, his one son was a chip off the old block, and Peter Winn had no meek notions concerning the intrinsic value of said old block.