"Yes, I imagine they did. Where are your men now?"

"Out working on Number Six, trying to get it up."

"Better get them together and pack them over to Control Tower, fast," said Kielland. "I mean everybody. Every man in the Installation. We may have this thing just about tied up, if we can get out of here soon enough—"

Kielland's chair gave a sudden lurch and sailed across the room, smashing into the wall. With a yelp he tried to struggle up the sloping floor; it reared and heaved over the other way, throwing Kielland and Sparks to the other wall amid a heap of instruments. Through the windows they could see the gray mud flats careening wildly below them. It took only an instant to realize what was happening. Kielland shouted, "Let's get out of here!" and headed down the stairs, clinging to the railing for dear life.

Control Tower was sinking in the mud. They had moved faster than he had anticipated, Kielland thought, and snarled at himself all the way down to the landing platform below. He had hoped at least to have time to parley, to stop and discuss the whys and wherefores of the situation with the natives. Now it was abundantly clear that any whys and wherefores that were likely to be discussed would be discussed later.

And very possibly under twenty feet of mud—

A stream of men were floundering out of Administration shack, plowing through the mud with waders only half strapped on as the line of low buildings began shaking and sinking into the morass. From the direction of Number Six dredge another crew was heading for the Tower. But the Tower was rapidly growing shorter as the buoys that sustained it broke loose with ear-shattering crashes.

Kielland caught Sparks by the shoulder, shouting to be heard above the racket. "The transport—did you get it?"

"I—I think so."

"They're sending us a ferry?"