PositiveThe Washington Post[Gallagher] works into her account the role of women in the Postal Service, noting that by 1892 more than 6,000 of the 67,000 postmasters were women, mostly in small communities. She introduces us to 'Stagecoach' Mary Fields, a 6-foot-tall former slave who was a crack shot and who liked to fight and smoke cigars when she wasn’t delivering mail in Montana. Gallagher delivers some fascinating anecdotes ... Gallagher [has] given us [an] engaging, well-written history of this troubled behemoth.