A few minute, ago I saw the trail of your ship disappear in the sky.

The trail they had been following, broad and clear before, disappeared completely.

Several paces north, at the ridge of a dune, the trail disappeared.

Clouds were bunching over the low hills ahead of them, where the trail disappeared.

They led me to the top, but above, on the exposed sand-drift, the trail disappeared.

And the trail went right up to it and disappeared.

Eyes streaming, he straightened up to find that the trail had disappeared.

The trail widened a bit, then suddenly gave out and disappeared.

The trail almost disappeared and they were wading through stiff weeds.

Now that the trail had finally disappeared, Duncan glanced up at the sky.