A final visual check on Gabriel showed him a forlorn figure bumbling through the mire. His espersense showed her mind was operating with cyborg simplicity, completely absorbed by the mechanics of walking.

He lowered himself into the algae.

The hovercraft had reached the end of the gardens now, rounding the last house in the row. Greg caught a glimpse of its insect-eye array of lights sliding into view as he dropped below the surface.

Espersense revealed all he needed, real and hypersense universes entwining smoothly. Toby leaning against the prow, fists clenched, eyes bugging, slipstream plucking at hint. The merciless lights finding Gabriel. Her legs buckling, sending her toppling forwards. Toby's howl of revenge consummation.

Greg could hear a throbbing sound transmitted through the filthy water, getting louder.

Toby's mind was a lurid spew-point of animus thoughts zooming towards him.

Greg pressed his feet down hard as the hovercraft rumbled directly overhead. He broke surface, bringing a cloying cone of algae with him. A blast of desert-air wind escaping from beneath the hovercraft skirt ablated the mucus from his face. He kept rising like a shabby tenth-rate Neptune, galvanised spear in his hand, already drawn back for the throw. Aiming. The pole steady. And fling.

It shot through the wide mesh of the protective carbon fibre grille at the rear of the hovercraft, hitting the spinning propeller full on. The trajectory bent then as the tip was chopped by the blade's leading edge, tugging it down and round. That, by itself, wasn't disastrous, the blade edge was designed to handle bird impacts. But the length of the pole meant it was deflected right into the mounting. The propeller's axle-bearing sheared off instantly under the terrible impact stress. And a two-metre-diameter five-hundred-R.P.M. buzz-saw exploded out of the grille to digest the rear of the pneumatic hovercraft.

There was a thunderclap blow-out, and the prow of the hovercraft bucked up into the air, losing rigidity, light beams strafing the sky. Three bodies and pieces of loose equipment were catapulted in a short arc. A tremendous spume of water jetted up as the propeller hit the algae, chewing through. One of the bodies fell into its base. The shredded hovercraft hull flopped back down. The lights went out, and the spume died.

It began to rain gobs of mud and algae, pattering down over a wide area.

One mind had survived, the body which housed it writhing feebly. Another body was facedown in the water, Toby. Of the third there was no sign.

Greg waded forward. It was easy going. A vast patch of the street had been stripped of its covering of algae.

Gabriel was floating on her back, half submerged. Greg got his hand under her head and lifted her. She coughed weakly. "I did it, didn't I, Greg? Just like you wanted."

"Sure did, and no messing."

"Did you get 'em?"

"Yeah, they aren't going to hazard anyone again."