Nowadays it's no big deal or a girl to travel seventy-five miles. But when Charlotte May Pierstorff wanted to cross seventy-five miles of Idaho mountains to see her grandma in 1914, it was a very big deal indeed. There was no highway except the railroad, and a train ticket would have cost her parents a full day's pay. Here is the true story of how May got to visit her grandma, thanks to her spunk, her father's ingenuity, and the U.S. mail.