ten o'clock
` Mind your own business , ' that 's my rule . '' She spoke with defiance , as if the contrary were being asserted by some invisible person who might appear and gain hearing and belief . She went on : `` If Mr. Ellison wants it , why I suppose it 's all right . But you ca n't stay out later 'n ten o'clock . '' `` I sha n't go out at all of nights , '' said Susan eagerly . `` You _ look _ quiet , '' said Mrs. Wylie , with the air of adding that appearances were rarely other than deceptive . `` Oh , I _ am _ quiet , '' declared Susan .