A short distance beyond each set of stairs was a door.

Two sets of stairs lead up to the second floor.

A set of narrow stairs led up to his right.

They turned down another hall, which ended in a set of stairs.

He took the first set of stairs almost at a run.

I didn't want him struggling to get free on the next set of stairs.

He stood on the top for a moment and then descended quickly, as if going down a set of stairs.

I've never seen anyone fall down a set of stairs, though.

The main dining room is up a small set of stairs.

Stepping inside, he took a set of stairs deep into the earth.