Read it through once

"I laughed at her, and so it went on for an hour or more. Then she suddenly calmed down. I knew something was up, only I didn't know what. I don't know if I told you we was in lodgings--the usual sort, drawing-room with folding doors, the bedroom at the back. She went into the bedroom, and I followed, just to make sure she couldn't get out that way. There was a chest of drawers before the door; I thought she couldn't move it, and went back into the sitting-room. But somehow she managed to move it without my hearing her, and before I could stop her she was down the stairs like lightning. I went after her, but she had too long a start of me, and the last I heard was the street door go bang."