Capo it up to the 6th fret, to play along with the record (Ian & Sylvia's "Four Strong Winds" album)

  Intro:
  / C /G7 C/ (x4)
  / C / C / G / G / G / G / G7 / C / G7/ C /
  
  F         G7    F            G7 
  four rode by... rode through here
          C                  G7        C
  three Mclean boys and that wild Alex Hare
  F         G7       F        G7
  they were armed... all were armed
         C              G7            C
  it was them; I'd have known them anywhere
  
      C               Em              F             C
  oh, Willie Palmer's stallion was no twenty dollar cayuse
      C                   Em            F           (G7)    C
  and when the wild bunch stole him, he high-tailed it into town
  C                Em                F            C
  Ussher, in those days, was keeping order in the district
         C                Em                  F         (G7)     C
  but, before he'd ridden thirty miles, the McLean boys shot him down

Playing it out of key of C formation makes the fast picking intro a bit easier. And the (G7) in the 2nd & 4th lines of the verses is optional. I like it; it echoes the quick G7 to C single strums in the back-up rhythm guitar during the first part of the intro.