Here were more skeletons, so many that Roland had to tread upon some in order to pass.

If there had been another path to take I would happily trod upon it.

That is fulfilling its very highest use when no foot ever treads upon it.

She knew that she was treading upon very dangerous ground.

He trod upon them, crushed the amber beneath his feet.

The silence was long and cold, as if he trod upon forbidden ground.

Three steps were ready to give should he tread upon any one of them.

Its feet fell with a heavy, measured tread upon the carpet.

"Do you think perhaps I trod upon their toes unknowingly?"

She heard his measured tread upon the boards in the kitchen and smiled.