eftsoons

from The Collaborative International Dictionary of English v.0.48

Eftsoon \Eft*soon"\, Eftsoons \Eft*soons"\, adv. [OE. eftsone,
   eftsones; AS. eft + s[=o]na soon. See {Eft}, and {Soon}.]
   Again; anew; a second time; at once; speedily. [Archaic]
   [1913 Webster]

         And, if he fall from his capel [horse] eftsone.
                                                  --Chaucer.
   [1913 Webster]

         The champion stout eftsoons dismounted.  --Spenser.
   [1913 Webster]