UPDATE – M&N Main Line – Schwartzburg to Hilbert New information and photographs of Cedarburg, Wis., have been added to The Milwaukee & Northern Main Line from Schwartzburg Junction to Hilbert Junction page. The former M&N main line at Cedarburg, Wis., on 11 February 2021. Photograph by Tom Bruss.The former M&N main line at Cedarburg, Wis., on 11 February 2021. Photograph by Tom Bruss. You Might Also Like Round Trip Ticket Price to Milwaukee in 1872 February 5, 2020 UPDATE – Main Line – Fort Howard to Menominee River and Reminders of Same November 27, 2022 UPDATE – Reminders of the Main Line – Hilbert Junction to Green Bay April 23, 2023