When the pony express rider spoke he said that had been married 6 months. As Jim Hardie spoke to the wife he addressed her as miss.
Not only did Wells Fargo never operate the Pony Express or any similar service, during the period in which this series is set, the telegraph and the Union Pacific Railroad operated between Laramie and Cheyenne, WY eliminating the need for anything like a "pony express."
When the pony rider spoke to Jim Hardie he said he'd been married six months. When Jim Hardie spoke to the widow he addressed her as miss.