"Frankly," said Sherman, "I don't like it. Those johnnies are too smart to give up like that. I'll bet you a thousand dollars against a lead bullet that they've gone back there to figure out some surprise for us, and when it comes it's going to be a beaner. Those babies may be elephants to the eye, but there's nothing slow about their brains." "General Grierson doesn't think so," said Ben Ruby. "He's all ready to hang out the flags and call it a day. He sent home two more divisions of infantry yesterday." "General Grierson hasn't got the finest girl in the world locked up in that hole under the Catskills, burning her fingers off," said Sherman with a set face. "Say, those babies aren't licked by a million miles. Their guns are just as good as ours and that light stuff they put in them is worse than powder when it goes off. They just didn't have as many guns. I'm taking even money that when they come out again, they'll have something that will make our artillery look sick." They stood on a street-corner in Philadelphia, the new headquarters of the army of the federated governments. "Yes, but what are we going to do about it?" asked Ben. "A lot. For one thing we might go up there and try to bust in, but I don't think that would be very hot. They'll be expecting it. What we can do though, is get General Grierson to give us one of the laboratories here in town and some men to help us, and dope out a few little presents on our side of the fence. I learned plenty through those thought helmets of theirs while I was in that place, though I didn't realize I was getting a lot of it at the time. Those helmets work both ways, you know, and they couldn't keep me from picking up some of their stuff, especially as they were so anxious to find out what I knew they didn't watch themselves." "Nice idea," said Ben. "I know a little about chemistry and between us we might put over something good. Let's Go." An hour later, they were installed in their own experimental laboratory, just off Market Street, with enough assistants to help them with routine work and Gloria Rutherford and Murray Lee to keep them amused. "All right, chief," said Ben, when they were installed. "What do we do first?" "Figure out some kind of armor that will stand off whatever kind of ray they pop up with, I guess," offered Sherman. "May I stick my two cents in?" said Murray Lee. "I don't think that any kind of armor is going to do a lot of good. For one thing, you don't know what the Lassans are going to produce. Those tanks we had were armored against the best kind of shells, and the Lassans turned up with the light-ray that made them look like Swiss cheese. It's your show, but if I were fishing for something, it would be a way to sock those guys. In this kind of war, the man that gets in the first punch is going to beat." "That light-ray of theirs is pretty good," said Ben. "From what you know about it already, you ought to be able to dope out a pretty good heat ray."