Eight o’clock sharp
You just trip out and hold the horse ; I do n't think Sarah understands it . '' They stayed a very short time , and as they were leaving , Lupin said : `` I want you both to come and dine with me next Wednesday , and see my new place . Mr. and Mrs. Murray Posh , Miss Posh -LRB- Murray 's sister -RRB- are coming . Eight o'clock sharp . No one else . '' I said we did not pretend to be fashionable people , and would like the dinner earlier , as it made it so late before we got home . Lupin said : `` Rats !