about nine o'clock
Mary felt vastly relieved ; and yet not altogether easy . One could not venture to doubt the master , but it was a queer-like sound for a rat to make . Mr. Rattar had brought back a great many papers to-day , and sat engrossed in them till dinner . After dinner he fell to work again , and then about nine o'clock he rang for her and said : `` The gentleman I expect this evening will probably be late in coming . Do n't sit up . I 'll hear him and let him in myself . We shall be working late and I shall be going upstairs about those papers .