The Collaborative International Dictionary of English v.0.48:

Bypath \By"path`\, n.; pl. Bypaths.
   A private path; an obscure way; indirect means.
   [1913 Webster]

         God known, my son,
         By what bypaths, and indirect crooked ways,
         I met this crown.                        --Shak.
   [1913 Webster]

WordNet (r) 3.0 (2006):

bypath
    n 1: a side road little traveled (as in the countryside) [syn:
         byway, bypath, byroad]