She reached the address; there was no sign of activity.

After ten minutes there was still no sign of activity.

From where we waited, the only sign of activity was some coming and going in the trees.

Several lights were on in the windows, but I saw no sign of activity.

There were many signs of activity around it, though at the moment nothing was actually moving.

This was the first sign of activity they had come across.

I watched the house for an hour, but there was no sign of activity.

But they were still too far out in the bay for him to see any signs of activity on the beach.

In fact, no signs of unusual military activity were reported.

There were no signs of activity on or around it, but that situation could be changed within a few minutes.