His shape merged with darkness and followed a circuitous path along a back street.

Then the phantom shape merged with the darkness.

The shape entered the opening and merged with the darkness of a bay window.

The phantom shape merged with the darkness of the study.

A blackened shape merged with the darkness of a street.

His shape merged with the rocks and star shadows.

A great gray shape merged with the doorway, blotting out the stars.

Silently, the tall shape merged with the darkness beyond the window.

His tall shape merged with the blackness of the side street.

As it neared the avenue at the end of the street, the moving shape again merged with the black fronts of the building.