Copied from the site Sorcha linked to. Not folk, but I think it has historical significance.
-Joe Offer-

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AT MAIL CALL TODAY
            -- Gene Autry --

(G) At mail call to-day love your last letter (D7) came,
      I just stood there smiling till they called my (G) name;
      As I read it over my (G7) skies turned to (C) grey,
      And (D7) tears dimmed my eyes love, at mail call (G) to-day.

    I can't understand love what happened to (D7) you,
    The day that I sailed love you said you'd be (G) true;
    But now it's all over, what (G7) more can I (C) say,
    My (D7) poor heart was broken at mail call (G) to-day.

    I slept in the foxhole amid shot and(D7) shell,
    I'm telling you darling it's worse than all(G) hell;
    I thought you would wait love while(G7) I was(C) away,
    But(D7) my castles tumbled at mail call(G) to-day.

    I hope you'll be happy with somebody(D7) new,
    But always remember my heart beats for(G) you;
    Good luck and God bless you wher-(G7)ever you(C) stray,
    The(D) world for me ended at mail call(G) to-day.