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 long ago; yet this neighborhood wasn't precisely the best spot to disregard a threat of terrorism,—especially when you've found ancestral gas pipes freshly chiselled for no use you wish to put them to.

"We've expected trouble from radicals about this stage in our foreign financing, Fanneal," Teverson said to me. "We've guarded Géroud and Strathon from the minute they passed quarantine; we've double-guarded these premises with special men who are watching every stranger who comes in to-day; we've taken every precaution—or thought we had. That's why Sencort was so sure nothing could happen."

He stepped nearer to the window and I realized that he was not standing there merely to think, but he was intentionally showing himself to convince any watcher that the room was occupied. He turned about and went on, "No one knows where the other ends of these pipes are now; of course they haven't been used for decades. They might stop anywhere or they might have been led on indefinitely. If what killed Costrelman came through the air—and it seems certain it did—and if those pipes are conveyors for more of it, they could have pumped it in and nobody suspected till some-