oversight. "It'll please him, and won't hurt us," said Tom to his father. "Koku will keep out any prying persons." "I suppose you are doing well to keep it a secret, Tom," said Mr. Swift, "but it seems as if you might announce it soon." "Perhaps we may, Dad, if all goes well. I've given her a partial shop-tryout, and she works well. But there is still plenty to do. Did I tell you about meeting Blakeson?" "Yes, and I can't understand why he should be in this vicinity. Do you think he has had any intimation of what you are doing?" "It's hard to say, and yet I would not be surprised. When Uncle Sam couldn't keep secret the fact of our first soldiers sailing for France. How can I expect to keep this secret? But they won't get any details until I'm ready, I'm sure of that." "Koku is a good discourager," said Mr. Swift, with a chuckle. "You couldn't have a better guard, Tom." "No, and if I can keep him and Eradicate from trying to pull off rival detective stunts, or 'deteckertiff,' as Rad calls it, I'll be all right. Now let's have another go at that carburetor. There's our weak point, for it's getting harder and harder all the while to get high-grade gasolene, and we'll have to come to alcohol of low proof, or kerosene, I'm thinking." "I wouldn't be surprised, Tom. Well, perhaps we can get up a new style of carburetor that will do the trick. Now look at this needle valve; I've given it a new turn," and father and son went into technical details connected with their latest invention. These were busy days at the Swift plant. Men came and went--men with queerly shaped parcels frequently--and they were admitted to the big new building after first passing Eradicate and then Koku, and it would be hard to say which guard was the more careful. Only, of course, Koku had the final decision, and more than one person was turned back after Eradicate had passed him, much to the disgust of the negro. "Pooh! Dat giant don't know a workman when he sees 'im!" snorted Eradicate. "He so lazy his own se'f dat he don't