After twenty metres the tunnel began to curve, rising upward in a long gentle spiral.

Brim looked up as the Leaguer angled into a gentle spiral, clearly designed to bring him in on R6595's tail.

Putting out minimum thrust-a gentle spiral out for a while, then reverse to drift back in.

Karr flew a gentle spiral in from shore, attempting to locate any sign of the abandoned colony.

And suddenly they were clear, sailing upwards on the comparatively gentle spirals of hot air.

In that case, they said, the plane would more likely have descended in a gentler spiral.

It was a glass-and-chrome-rail construction, rising in a gentle spiral.

After staring at them for a minute, he allowed the two pieces of paper to waft in a gentle spiral into his large institutional wastebasket.

Folger awakened reluctantly, head still full of gentle spirals over glowing coral.

At this point the dragon turned suddenly into a gentle downward spiral.