The Collaborative International Dictionary of English v.0.48:

Farther \Far"ther\, adv.
   1. At or to a greater distance; more remotely; beyond; as,
      let us rest with what we have, without looking farther.
      [1913 Webster]

   2. Moreover; by way of progress in treating a subject; as,
      farther, let us consider the probable event.
      [1913 Webster]

   No farther, (used elliptically for) go no farther; say no
      more, etc.
      [1913 Webster]

            It will be dangerous to go on. No farther ! --Shak.
      [1913 Webster]