Tunnel 13
https://postalmuseum.si.edu/exhibition/tragedy-at-tunnel-13-exhibition/the-context
The holdup of Train 13 on October 11, 1923, took place in the Siskiyou Mountains just beneath treacherous Siskiyou Pass, where Tunnel 13 served as an integral connector on the Southern Pacific rail line for over 100 years. (Southern Oregon Historical Society 1977.117.14, #034468)
