The Collaborative International Dictionary of English v.0.48:

Wher \Wher\, Where \Where\, pron. & conj. [See Whether.]
   Whether. [Sometimes written whe'r.] [Obs.] --Piers Plowman.
   [1913 Webster]

         Men must enquire (this is mine assent),
         Wher she be wise or sober or dronkelewe. --Chaucer.
   [1913 Webster]