Shadows moved all around them as if coming to life.

The Shadow came to the third name on the list.

The Shadow had come out near the side door of the office building.

The Shadow came quickly to the reason for his call.

Years and days passed away, then the shadow came again.

The shadow on the wall moved and came to rest again.

But before she got to it the shadow came back.

Soon a black shadow came into view and moved to the hall door.

The shadow moved from under the trees and came with her.

But I just can't understand where this shadow is coming from, and why.