commonplace the postmaster

When the postmaster had finished his supper, the girl
suddenly asked him : ‘ Dada, will you take me to
your home ?’ The postmaster laughed.  ‘What an idea !’
said he ; but he did not think it necessary to
explain to the girl wherein lay the absurdity.
That whole night, in her waking and in her
dreams, the postmaster’s laughing reply haunted
her * What an idea !