Read it through once

The shaggy eyebrows unbent a little, as he rolled the steps toward the shelf where the Johnsonian literature was placed. Jo skipped up, and, sitting on the top step, affected to be searching for her book, but was really wondering how best to introduce the dangerous object of her visit. Mr. Laurence seemed to suspect that something was brewing in her mind; for, after taking several brisk turns about the room, he faced round on her, speaking so abruptly that "Rasselas" tumbled face downward on the floor.