The Collaborative International Dictionary of English v.0.48:

Whichever \Which*ev"er\, Whichsoever \Which`so*ev"er\, pron. &
   a.
   Whether one or another; whether one or the other; which; that
   one (of two or more) which; as, whichever road you take, it
   will lead you to town.
   [1913 Webster]