Hawkeye's body, flat upon the roof, was too low to be reached from the ground below.

I was still upon the roof when the late moon rose.

Is not that the place where an object upon the roof might be expected to fall off?

A moment later he had drawn himself through the skylight and stood upon the roof of the building.

"Then our feet will be upon the roof," replied Michel.

I see him every day through my telescope upon the roof.

He dropped upon the roof, went to look at Carfilhiot.

Across from the point where they had entered there seemed to be a sort of chamber, built upon the roof.

I went out upon the roof of the church.

They came out upon the roof of the antique castle.