There was a soft tap on the closed outer door.

A soft tap at the door and Lucinda appeared, holding up two fingers.

When her hand brushed the third door, she stopped and gave three very soft taps.

Then she heard a soft tap on the window.

A minute later there came a soft tap on the bedroom door.

It was a relief to be interrupted by a soft tap on his door.

While The Shadow watched, a soft tap came from the door of the room.

A soft tap on the door brought her to her feet.

The portal closed with a hiss and a soft tap.

Nearly an hour went by before a soft tap came on the door.