Stagecoach Mary    Mary Fields, also known as Stagecoach Mary, was the first African-American woman employed as a mail carrier in the United States, driving her mail route by stagecoach from Cascade, Montana to St. Peter&#x27;s Mission, Montana. When hired, she became the second American woman in all to work for the United States Postal Service.    Born a slave circa 1832 in Hickman County, Tennessee. She was freed when American slavery was outlawed in 1865.