The Collaborative International Dictionary of English v.0.48:

Tinchel \Tin"chel\, n. [Written also tinchill.] [Gael.
   timchioll a circuit, compass.]
   A circle of sportsmen, who, by surrounding an extensive space
   and gradually closing in, bring a number of deer and game
   within a narrow compass. [Scot.]
   [1913 Webster]

         We'll quell the savage mountaineer,
         As their tinchel cows the game!          --Sir W.
                                                  Scott.
   [1913 Webster]