four o'clock
`` Thank you very much indeed , Susan , '' said Mrs. Aylmer the less . `` It will be a real treat , '' she added _ sotto voce _ , but loud enough for her sister-in-law to hear . `` H 'm ! I have tea at four o'clock , '' said Mrs. Aylmer the great ; `` I will just ring the bell and give orders ; then we shall have time for a nice comfortable conversation . My dear , '' she added , turning to her niece , `` would you oblige me by ringing that bell ? '' Florence rose and did so . There was an ominous silence between the three until the waiter appeared to answer the summons .