Read it through once

The words no sooner escaped her lips, than Mr. Grimwig, who had been affecting to dip into a large book that lay on the table, upset it with a great crash, and falling back in his chair, discharged from his features every expression but one of unmitigated wonder, and indulged in a prolonged and vacant stare; then, as if ashamed of having betrayed so much emotion, he jerked himself, as it were, by a convulsion into his former attitude, and looking out straight before him emitted a long deep whistle, which seemed, at last, not to be discharged on empty air, but to die away in the innermost recesses of his stomach.