The Collaborative International Dictionary of English v.0.48:

Dalesman \Dales"man\ (d[=a]lz"man), n.; pl. Dalesmen
   (d[=a]lz"men).
   One living in a dale; -- a term applied particularly to the
   inhabitants of the valleys in the north of England, Norway,
   etc. --Macaulay.
   [1913 Webster]

WordNet (r) 3.0 (2006):

dalesman
    n 1: a person who lives in the dales of northern England