about midnight
` I suppose you did n't doze at all , ' he said tentatively , ` while you were sitting up waiting for the telephone message ? ' ` Oh no , sir . I am always very wakeful about that time . I 'm a bad sleeper , especially in the neighbourhood of the sea , and I generally read in bed until somewhere about midnight . ' ` And did any message come ? ' ` No , sir . ' ` No .