about
nine o'clock
`` All right , '' agreed Dorothy . `` And say ! Let 's fix up something funny ! We 'll get all the alarm clocks in the house and set them so they will go off one after the other , just when Nellie gets to bed , say about nine o'clock . We 'll hide them so she will just about find one when the other starts ! She is n't really sick , is she ? '' Dorothy asked , suddenly remembering that the visitor might not be in as good spirits as she herself was .