Read it through once

He led me into a corner and conducted me up a flight of stairs,—which appeared to me to be slowly collapsing into sawdust, so that one of those days the upper lodgers would look out at their doors and find themselves without the means of coming down,—to a set of chambers on the top floor. MR. POCKET, JUN., was painted on the door, and there was a label on the letter-box, “Return shortly.”