Two hours in the cool forest, and they still hadn't seen any sign of human habitation.

So far there hadn't been a sign of human habitation.

There were no signs of human habitation anywhere around me.

No one has ever found any sign of other habitation.

Every sign of human habitation here is to be removed.

I had discovered not a single sign of human habitation.

For another hour they passed no sign of activity or habitation.

About 40,000 years ago: first signs of possible human habitation along the river.

These people had lived here for years; the places showed all the signs of long habitation.

In the valley below, there was no sign of habitation.