UPDATE – M&N Main Line – Schwartzburg to Hilbert New information and photographs of Plymouth, Wis., have been added to the Milwaukee & Northern main line from Schwartzburg Junction to Hilbert Junction page. The former M&N main line at Plymouth, Wis., on 13 March 2021. Photograph by Tom Bruss.A WSOR train passes the former MILW and C&NW depots at Plymouth, Wis., on 13 March 2021. Photograph by Tom Bruss. You Might Also Like NEW – Our 2022 Open House September 17, 2022 NEW – M&N Appleton Branch March 15, 2021 UPDATE – Champion Branch August 1, 2022