Along pause followed, the carriage remaining at the door.

Instead of bringing some one to the house, it had apparently arrived to take some one away.
The next event was the return of the servant to the front door.

They listened again.

Again no second footstep was audible.

The door was closed; the servant recrossed the hall; the carriage was driven away.
Judging by sounds alone, no one had arrived at the house, and no one had left the house.
Julian looked at Mercy.