They had been seen going up the stairs, hadn't stopped to talk.

I turned away from her and went up the stairs alone.

She went up the stairs and was gone a bit.

They went up the stairs without saying a word to one another.

He went up the stairs and found the room on his right.

Either he'd gone up the stairs, or he was still inside, making his way close to the floor, trying to get to the back door.

I took a right, going up the outside stairs and into the building.

He turned and went up the stairs to his office.

Another couple they did not know went up the stairs about the same time and turned to the right.

He went up the stairs and turned left, toward the east end of the building.