"Because if they were, they wouldn't walk through cellar walls."

The secretary, thinking himself alone, began to examine a grated opening in the side of the cellar wall.

The slope, however, had produced a space that showed a portion of the cellar wall.

He turned and faced them, where they stood like big-eyed ghosts against the cellar wall.

The boys found something when they started knocking through that last cellar wall you wanted cleared.

Then he kicked the cellar wall with his bare feet, first the right, then the left.

He pushed himself to his feet and stood for a few moments with his back to the cellar wall.

The cover of a science journal was taped to the cellar wall.

He turned his attention back to the cellar walls.

He walked around a crook in the cellar wall and was gone.