The first thing he saw was the thin trail of smoke from the kitchen chimney.

And then I noticed a thin trail of smoke from behind a rock.

Hugh blew a thin trail of smoke into the air.

Here the blood had been smeared into a wide, thin trail.

It's leaving a thin trail of blood along the rug.

A thin trail of smoke was rising up from the cigarette.

A thin trail of smoke in the air indicated their passage.

There was a thin trail of something that might be dust, hanging against the sky.

There was blood on his shoe, and a thin trail to the next car, but he still had to look.

Just a thin trail rising up from the dry grass.