 Why are the webfoots chasing Stinson and Sybtl?
He touched the pencil-line scar behind his ear where the cylinder was buried, marveling at the power stored there, power to fling him from earth to this fourth planet of the Centaurian system in an instant. A gray, funnel-shaped cloud of dust stood off to his left. Dark clouds capped one peak of the mountains on his left. The sun burned fiercely, although he would have said it was about four o'clock in the afternoon, if this had been Earth. But up to now the tube and the chain was the only evidence of an advanced technology, unless the ancient inscriptions in the stone wall of the pool, and the statues lining the wall were evidences.
 The webfoots think Sybtl did not please the God.
 The webfoots think Stinson took Syblt against her will.  Stinson accidentally killed one of the webfoots while disarming him.  Stinson murdered the leader of the webfoots.  The webfoots think Sybtl did not please the God.