Both Tom and Mr. Swift were shocked by this latest blow of their enemies. Tom called Ned Newton at the Swift Construction Company at once and told him the news.

"How soon will the Quakelizors be ready, Uncle Ned?"

"They're finished, Tom. We're running a final inspection on them right now. We can have them ready to ship out by one o'clock."

Tom relayed word to the Pentagon. Bernt Ahlgren was greatly relieved. "By the way," Tom went on, "what about the sites? Have they been chosen yet?"

"Only tentatively," Ahlgren replied. "We wanted to get your opinion first."

One of the deflectors, Ahlgren felt, should be based in position to guard the New York and New England area, in view of Intelligence warnings about a probable attack on New York City. Another, in the Cumberland plateau region of Kentucky, could damp out shock waves threatening either the heavily industrialized Great Lakes area or any southern city.

As to the other three Quakelizors, Ahlgren suggested that one be installed on the West Coast, one in the Black Hills of South Dakota, and the third on the Atlantic island of San Rosario. This would protect both Latin-American allies and Caribbean defense bases of the United States.

Before deciding, Tom asked that Dr. Miles at the Bureau of Mines be circuited into the telephone conversation. Mr. Swift, too, joined in on another line. The four scientists discussed the problem and referred to geologic maps. Finally the exact sites were agreed upon.

"Dad, I'm going to deliver and install one of those Quakelizors myself," Tom declared, after the telephone conference ended. "Judging from that phone impostor last night, there's no telling what sort of trick our enemies may try next!"

Mr. Swift approved heartily. "Good idea, son. In the meantime, I'll see what I can accomplish with Ole Think Box here."