\Eft*soon"\, Eftsoons \Eft*soons"\, adv. [OE. eftsone,
eftsones; AS. eft + s?na soon. See {Eft}, and {Soon}.]
Again; anew; a second time; at once; speedily. [Archaic]
      And, if he fall from his capel [horse] eftsone.
                                               --Chaucer.
      The champion stout eftsoons dismounted.  --Spenser.